I usually DO shoot somewhat better when firing a revolver DA as opposed to SA...fast or slow, close or distant...doesn't seem to make any difference, DA is the way, at least for me. This may be because, since about '75 or '76, I have intentionally shot almost all of my practice with revos using the DA mode...after all, if you EVER need to fire in an EMERGENCY(read SELF DEFENSE), how are you going to do it? DA, right? Right! I've seen it "theorized" that DA shooting requires you to have a very firm, UNIFORM grip on the gun, leading to good accuracy...also, shooting DA, you don't have to "break" your hold to thumb the hammer back, again leading to the uniform grip most conducive to good shooting...lastly, there is the issue of the "surprise break" of the trigger, when the gun fires...much easier to get with the DA triggerstroke, whereas its much easier to anticipate the "trigger break" with a crisp, light SA pull--can anyone say "invitation to flinch?" As always, YMMV.
BTW-what Blue Heeler refers to is also called "staging" the trigger...works okay in controlled, range-type situations, but, for what I hope are OBVIOUS reasons, that method should NEVER be attempted for "serious" work...WAY TOO EASY to go "jus' a lil' too far" on that trigger-pull, and...BANG! OOPS!...
Much better to work at perfecting the "straight-thru" DA triggerstoke...FWIW, all the "big boys" use the "straight-thru" method in PPC, IDPA, ICORE, etc....mikey357