Some statistic suggest that there is little difference in actual use between the three calibers. And there is also some evidence that suggests that luck may have a substantial part to do with the outcome also. Ever hear someone in a trauma center say if the bullet had been a centimeter or two to the left/right the guy would have died. Even really really good shots may have some difficulty placing shots a centimeter or two during an actual fight.
I never talked to anyone who had to fire their gun who said "I wished I had the smaller gun and fewer rounds with me" Just because you find a hundred people who agree with you on the internet does not mean you're right.