melensdad on this forum likes to cite some FBI study he found but can't produce that the 1911 gives the best "first shot hit potential". Have you seen 1911s produce better results in force on force classes? Based on this post I'm thinking no.
I don't think the type of gun matters much as long as it works every time you pull the trigger. Most 1911's tend to not work very well despite their owners' claims to the contrary. It's a rare 1911 that makes it through one of our Fighting Pistol classes and it's a rare Glock that doesn't.