Having been involved as a trainer in one capacity or another as both a military officer and now an NRA PP instructor, it has been my observation that almost all of the malfunctions I have observed have been the result of poor maintenance (in particular lack of lubrication in new guns). Equally as common has been unfamiliarity with a borrowed gun or one that just hasn't been fired much.
A decline in malfunctions has been obvious at our club's monthly action pistol matches. Members who attend regularly have far fewer issues, and seeing shooters learn and develop from novice to skilled has been a gratifying trend.
Any decent quality gun has been designed to work, not fail. Lack of practice, maintenance and familiarity are the main problems, regardless of specific make or style.
The United States Marine Corps: Providing the enemies of America the opportunity to die for their countries since 1775. Semper fi.