This is going to be a bit long winded, but if you want to know why I don't think a Star has any place in a big match, then read ahead. BigDave pretty much nailed it and I agree with him, but I'll take it one step farther.
In my work life, I design a lot of performance assessments. A performance assessment allows a student to demonstrate what they know, and what they can do, preferably through an authentic problem solving activity that allows them to demonstrate their ability. To properly assess a student's skills, whether those skills be welding, driving a car, or shooting, the assessment must be reliable, valid, meaningful, and fair. The student should also have multiple opportunities, delivered in diverse formats, over time, to demonstrate their ability. The problem I have with a Star in a major match is a personal belief that the assessment format is inappropriate for maintaining the health of the sport.
As BigDave pointed out, the shooting test is equal for all shooters (that is the targets are presented the same way) right up until the first plate is removed. Even though I got my butt jumped for using inexperienced shooters as an example, I am going down that road one more time.
Let's say little Johnny Wannablaster goes to an Area match with his father. Johnny is young, exubberant, and he has been looking forward to attending his first big match. Johnny starts shooting the Texas Star by shooting the very bottom plate. Johnny has just demonstrated he can hit the plate, but he has also shown he is not familiar with the prop. Johnny throws a couple more rounds downrange and hits another plate, but now he has the prop off balance and spinning like crazy. Like any good assessment, Johnny will now be provided with multiple opportunities to show his ability, or lack of ability.
Unfortunately, the faster the prop spins, the more difficult the assessment becomes. Even when Johnny is successful in hitting a plate, if it's the wrong plate, his reward is to be faced with shots of increasing difficulty levels. By contrast, the better a person shoots, the easier the task. I suppose one can say that of any target, but this especially true of stars and windmills. With a static target, if the shooter has difficulties, they have the opportunity to take another shot at the same difficulty level. This is not necessarily so with a spinning target.
Is this type of assessment necessarily a bad thing? Well I suppose that depends on the intent of the test. Some of the most notorious tests that I have personally encountered that posed increasingly difficult questions (in the event of a missed question) were made by the IT certification industry. It was not unusual to take an on-line certification test that was scored on the fly. If a fundamental question was missed, the next question generated would be at a higher level of difficulty. If that question was missed, the next question was even more difficult. The intent was to weed folks out, fail them in their tracks, and send them back to square one if they missed due to a lack of fundamental knowledge. Their only salvation was to prove superior mastery of content if they missed a question as a result of just screwing the pooch.
My personal belief is the Texas Star can be excessively punitive to shooters who lack fundamental skills. I have no problem with putting a shooter in a position to demonstrate their ability, but I do have a problem with punishing a shooter by increasing the difficulty level beyond reasonable expectations after they have already failed. I don't believe such actions are in the best interest of attracting and retaining shooters.
Suppose I assess a couple of kids using the Texas Star system. I could compare Johnny D. Shooter with G.M Hotshooter. The test will end for each student when they have given the correct response to five questions. Each question will be worth five points and the questions must be answered in a timely fashion. A slow response time, or a missed question will result in the next question being more difficult than the previous question.
I would begin by asking both kids question number one. The question would be an easy one for young Hotshooter but it would be a bit on the difficult side for Johnny (say a star at xx yards). Both kids would get the first question correct (nail the first plate) and they would get identical questions for question number two (the second plate). But because Johnny D. Shooter was a bit slower than G.M. in responding to question number two, Johnny's third question will not be the same as Hotshooter's third question. In fact, Johnny's question will be much more difficult. G.M. Hotshooter will nail the third plate, I mean question, right away. Unfortunately, Johnny D. Shooter will miss the third question. But don't worry, Johnny will be given additional opportunities, they just won't be the same as G.M.'s opportunities. Because little G.M. is so bright and so fast in shooting his plates, darn it I mean answering his questions, his last two questions will be only slightly more difficult than the previous questions, and he will answer them correctly in a timely fashion.
Unfortunately, Johnny D. Shooter misses three questions in a row, and now the plates, I mean questions, are spinning by at warp drive, and with each instant that passes, the questions become increasingly difficult. At last young Johnny has answered correctly five times. Of course those questions took longer to answer and were more difficult than Hotshooter's plates (questions) because young Johnny is a bit slower on the draw (no pun intended).
Time to enter grades in the grade book. Let's see, G.M. got 25 points in 3 seconds for a hit factor of 8.333. According to my scoring guide that's an A. Hmmm, Johnny got 25 points in 8 seconds for a hit factor of 3.125 and that's only 37 per cent of G.M.'s score, or an F. In fact, the grade is an F minus.
Was the test meaningful, fair, valid, and reliable? Can I justify asking more difficult questions of a lower performing student than I asked of the higher performing student by claiming both students controlled their own destiny? Did I set one student up for success and the other for failure? Oh screw it, give the kid an F, it's what he earned.