I know I'm just a youngster at this stuff (not by age, I assure you), but shouldn't it be most important that your carry gun be the one you are most accurate with? I mean, it seems to me that if paper is difficult at 7 yards, how's it going to be with a moving, ducking, shooting-back-at-you target? I would want to minimize the possibility of hitting store clerks, gas pumps, cars, innocent men, women, children, etc., whatever might be past my attacker by having my best shooter in my hand.
I'm not sure what level of accuracy he was referring to but I agree accuracy is very important. I've been told you only retain about 60% of your accuracy under stress. So a 1 inch group might open up to 2 inches.
This is one reason I do not feel comfortable with my Kahr yet. I can put rounds where I want them with both of my .45s but not so with the Kahr. Even at 60% I feel I could put most of the rounds COM.
I strive to be as accurate as possible with all of my guns mainly to make up for lack of skills when the blood is flowing.