I am a bit surprised at the almost 30% of respondants that have had a failure of some type with their 1911s. (I was one of them) Its higher than I thought it would be.
I'm not really surprised.
When you consider the importance of replacing recoil & magazine springs, periodic inspections/maintenance, using good quality magazines AND decent ammunition, and the variable familiarity, experience and skills of some people using a 1911 ... AND the apparent variable compatibility of magazines & pistols ... AND the QC of the incredible number of folks making not only the guns, but the parts being used in the guns ... I'm just not all that surprised.
The shooter variable can be a significant one, too. I know everyone owning/shooting a 1911 likes to think they're fully familiar and competent to shoot them, but shooter-induced problems still arguably rank as the significantly greatest cause of pistol functioning 'problems'.
When you start reducing the overall size of the 1911 platform you can sometimes see an upswing in folks reporting 'problems', as well. You'll hear lots of folks offer the opinion that the smaller the platform is reduced, the more potential exists for functioning problems to occur. I can't disagree. I think the smaller platforms do ask more of their users.
I've had more than one user of a diminutive 1911 pistol tell me they can't get their pistols to consistently feed & function, asking me to try them ... and then they work fine in my hands, but once I give it back to them they continue to experience problems.
Grip-related issues (engaging the grip safety insufficiently, thumbing the slide, too lightly tensioned, support hand's thumb riding the slide stop, etc.) and forearm/wrist stability (weakly locked wrist, 'broken' or unlocked, etc.) can create the potential for one person to 'have problems' and yet the same gun may function just fine in the hands of another person, using the same ammunition.
On the other hand, I've seen the occasional small 1911 style pistol just not easily respond to the attention of either the factory or a licensed gunsmith who is reported to specialize in 1911's. I empathized with a shooter one time who had their own gunsmith spend a lot of time trying to get their small 1911 pistol, made by one of the better known makers of such pistols, to reliably function. After the most recent trip to the gunsmith to do something to make the pistol work, the owner brought it to a CCW class and still experienced repeated functioning problems. Frustration was evident. Good ammunition, good magazines, properly lubricated and a skilled shooter who indulges in competition. No joy, though.
I suspect that on the one hand we often have folks who enjoy tinkering, modifying & 'improving' their 1911's ... and on the other end of things we have everybody and their relatives making them nowadays, and who knows how consistent the QC is on any given day.