BEARING ARMS references Richard Mann's test of the new Remington RM 380 pocket pistol. Bob Owens, a very thoughtful gunny in his own right, notes that the RM 380 held up well under more continuous fire than you'd expect in a pocket pistol.
My experience has been that once you get past the "Old Skool" pocket pistols of the previous era (think vest-pocket .25s, etc.), pocket pistols, especially guns from from "name" manufacturers, are pretty much as reliable as dirt. I've shot the crap out of a half-dozen or more Ruger LCPs without a single failure. Kahrs are legendary in their reliability. I can't estimate how many rounds I've put through little Kahrs over the years. One is in my pocket right now.
I know a lot of guys carrying S&W Bodyguards and I don't recall any issues there.
I even once intentionally tried to break a Kel-Tec .32. I took a couple of cop friends and 1000 rounds of hot Spanish ball to the range, and we put at least 500 of those rounds (in truth, I don't remember the exact number, but we got tired after about half the case was gone...but I was getting tired of moving the case of .32s around my gun room) with zero — ZERO — malfunctions. The little gun was blazing hot and it did indeed seem looser, but it kept firing. It still shoots just fine.
I think there's just less to go wrong.
OTOH, especially on the older versions, if the little gun doesn't run, it is a godawful nightmare to get them to run. We used to joke about the perfect, jewelry-like Walther TPHs. If they ran, they were perfect. If they didn't, all the forces of heaven and earth couldn't fix them.