It's pretty funny when people have to exclaim that they once saw a Glock "puke" (whatever that term means exactly).
It is like "You know what, one time, I saw a Glock jam! Tee hee!"
It is the old "man bites dog story". News is not newsworthy if it is an every day occurence.
What I am getting at in so many words is that no one ever says "You know what, I saw a really nice 1911 jam once!". Why not? Because it happens every day! It is not even worth saying! Guns jam every single day, and Glocks are the least of them.
My friends Sig jams like crazy, even though it just got back from the factory with a full tune up. Slide doesn't lock back, fails to feed, and stovepipes. It also goes without saying that I have seen $1000 1911's that jam every magazine, with ten different magazines tried and hundred of dollars trying to fix it. I have never seen a Glock jam due to mechanical failure, period. I have seen some shoddy ammo that does not fire, with bad primers or no powder in teh case, but I have never seen a Glock mechanically fail to funtion in any way. But when I do, you can bet that I am going to remember it, because it will be an amazing sight.
I shot a match recently and had two failures to chamber in my Glock. (Gasp!) Why? Because I was using some ****ty ass reloads. The cases were expanded and wavy like an accordian and would not chamber. That ain't the fault of the gun, there is no gun that would chamber that crap.
The point is, just the fact that you have to say that you saw a Glock jam before proves the point of how reliable they are. If they were not so darned reliable, it would not be worth mentioning that you saw one jam before. You would not giggle at the sight of one jamming. When you see a fancy 1911 jam, it is just another day. When a Glock has one of it's few jams (even though you have no idea what kind of ammo was being used, what kind of mags (aftermarket?), springs, etc), then you giggle, nudge your neighbor and write it down on your calendar so that you can remember the day you saw a Glock jam!
Instructors at all the major firearms schools, when asked what is the most reliable gun they see come through their school, ALL say that the Glock is the most reliable gun. These are people that see hundreds of guns a weekm thousands of rounds fired a week through them, and can take an accurate survey.