Yeah, if a person is checking for malfunctions while shooting they should be taking better care of their firearm in the first place.
I think your head would spin if you saw how fast my g/f fixes guns that I make malf on her...
As a 1911 guy, it would be worth your while to practice up too...
Anything that lessens the time my pistol is out of the fight is worth learning. That half second to one second of speed increase could save my life one day.
I (and I can tell that TDC is as well), am all about increasing speed through efficiency. Efficiency is the balance of speed and effectiveness.
Racking the slide works on a reload whether the slide is open or closed, and it works when there is a bad round in the chamber, or no round in the chamber, or 2 rounds trying to be in the chamber... the motion for fixing a stovepipe is also the same. That's 3 of 4 possible malfunctions covered by 1 motion, that happens to be the same way one can reload their pistol.
Hitting the slide release works if the slide is open, and only for reloading.
There is no 1/2 or 1 second advantage to it. We're talking a tenth slower at best. As I said originally, by running the slide every time you reload, you are practicing multiple functions, not one. It may be a little slower on a reload, but knowing how to fix a malfunction without any thought, just a reaction is where time matters to me.
At the end of the day, I run my gun the way i like because it's right for me. I don't like arguing about which way is better or worse, but have a hard time not replying to elitist attitudes that say their way is best, when they are not informed on why others would do it differently.