Limp wristing
I was interested in trying to induce a limp wrist malfunction about a year ago. The only successful limp wrist that I've ever induced was on a XD9. I really had a very, very light grip on the gun. I think XDs are good guns, but I was unable to get this to happen with any other polymer gun that I shot that day. I tried with a Glock 19, Glock 17, Sig SP2022, HK USP, and Beretta PX4. I probably could've induced problems with the other guns if I would have tried a little harder.
I've heard that limp wristing is more of a problem with polymer guns because of how the weight is distributed in these guns. In general these guns have more weight in the barrel/slide and less weight in the frame/grip. The more "unbalanced" the gun, the more of a problem it is. Again, I read this online, so I really can't confirm that this is true, but it does make sense to me.