I think platform has as much to do with it as anything. We are not all the same, no 2 of us will shoot the same gun the same way. It is interesting though that certain platform/caliber combinations are easier for most people to shoot well. The 1911/45 ACP is one and the Glock 9mm is the other that come to mind for me. I do not shoot anything any better than my Glocks, that includes Smith revolvers, 1911's and H&K's. I can shoot faster with the 9mm conversion, but not better.
My rifle and pistol are tools, I am the weapon.