This seems akin to the "use a bigger hammer" school of thought, and I think may be not just untrue, but dangerous. If your gun is dirty, wet, or your form is not up to par (linp wristing, improper grip, whatever), +p ammunition is only going to exacerbate the issue. Just because the round is higher pressure and "may" cycle the slide faster doesn't mean that it's a magic bullet. If you've got issues with your form, or a poorly maintained weapon, +p is going to cause more issues than it solves.
In fact, I can think of at least a few modern weapons that don't function particularly well on +p, period. The XD in 45 has a stock magazine spring that doesn't particularly like them. It's not strong enough to get a new round up before the slide cycles, causing significant issues for some users.