On the shooting ability of the average gun owner...
This is one reason why I demur when the typical gun forum Cletus lets loose with the old "Hurr durr, the average private citizen is a better shooter than the average cop!"
And I'm all "Uh, no, because the average private citizen gun owner is not you and your buddies at the IDPA match, it's the guy who bought the gun and the box of Hydra-Shok, loaded it, and threw it in his sock drawer."
On inconsistency in instructor dogma...
You'll lose all fine motor control in a gunfight! You won't be able to use the slide stop!
Also, be sure and only let the trigger out until you feel it reset.