It seems to me that the discussion of the usefulness of pistols for ATC work is somewhat academic if the CFOs have got together and decided that pistols are not suitable for ATC applications. Doesn't much matter what we think at that point.
As to whether SA vs DA revolver answers the question better, that is best left to the individual. I'm comfortable with my choice of SA, and prefer it mostly because of the small size of the gun and it's mechanical simplicity. Even a 4" M-29 Smith is bulkier, and an N frame Smith isn't near as big as A DA Ruger, Dan Wesson, or the ridiculously (IMO) large S&W X frame guns. As you can see from the pics, my loads are controllable, where if I was using a hot .475 Linebaugh, the gun would rise much higher in recoil. Once you get into the true big bores, .500 S&W, .475 & .500 Linebaughs, or the .500 Wyoming, the best thing is to load her down. The trouble is that once you are into bullet weights approaching 500 grs, any load that approaches a supersonic velocity from a 5" barrel is going to kick hard enough to make a follow up shot slow whether you shoot one handed or two, SA or DA. Still if I was to choose a big bore, I would look favorably on the belted .500 Wyoming, designed for a SA revolver of minimal dimensions.
If I have to draw the gun quickly, my palm is open when it hits the gun butt. My strong side draw is circular coming from the bottom of the grip, the retaining strap is unsnapped as my hand passes the snap, and closes on the grip as it passes it. Whether I carry cross draw or strong side, my thumb finds the hammer spur very quickly, and the hammer is cocked as not as the gun clears the holster as advocated by some, but as it extends to the target. My support hand hits the grip as soon as the gun is in front of me, about belt level. If I am shooting two handed, it is my supprt hand that cocks the gun. By the time the front sight is on target I already have 2 pounds pressure on a 4 pound trigger. If my draw is from a cross draw, my support hand has unsnapped the holster by the time my strong hand has contacted the grip.
I know that CC holds to the idea of fast reloads, and there is merit in that, but if I've fired 5 rounds of .44 magnum and the bear is still moving fast enough that I have to be concerned about the speed of my reload, I'd better be thinking about the last round for myself. I can shoot under stress, I have proven to myself that I can stay calm until after the action is over, provided I have enough exposure to bears up close throughout the year, and most years I do. But, you don't have to be away from it long before you loose your edge though. If you are faced by a female with 2 second year cubs you could be in very serious trouble, and this is the scenario where CC's fast DA shooting and fast reload wins the day, but only if you are still alive by the time you've made hits on all 3. A female with cubs often attacks line abreast with a cub on either side, so you must know before hand what you are going to do about it.
The thing to keep in mind though is that the bear cannot hurt you if he cannot touch you. These marvelous instruments that we carry give us the advantage of being able to touch him before he can touch us. I prefer to let things happen close. That gives the bear every opportunity to change his mind, but it also ensures that I have a simpler marksmanship problem to solve. If he comes straight in, my target is perhaps 3" wide and a foot deep. That is pretty easy at 5 yards, but you have to know what you are going to shoot at before hand. If you have to figure it out before the action starts, you've wasted far too much time. I know my target is not a 1200 pound bear, my target is a 200 pound head, and a 325 gr WFN bullet from a .44 magnum is more than enough for a 200 pound target.