I teach a lot of defensive pistol classes and 9 times out of 10 when a student on the line calls out a malfunction with their 1911, it is due to miscare, misuse, or mishandling. And these problems supercede all manufacturers. I think the biggest problem people have is that they buy a 1911, treat it like a Glock/XD/Sig and expect it to function as such. I can't count the number of students that have taken their 1911 out a couple of days before the class, put a hundred or so rounds through it, throw it back in the box without cleaning it and then bring it to class expecting it to work flawlessly.
I also believe that it speaks volumes for Kimber that the Marine SOCOM unit, LAPD and other SWAT teams, and the LAPD Special Investigative Services have all chosen Kimbers as their issue weapons (the US Shooting Rapid Fire Pistol Team also uses Kimbers but they are modified so I don't count them).