One of my XDs broke while shooting it after 3,245 rounds. Bad break, too, because it couldn't be fired at all until it was repaired.
A friend of mine has a Gen. 2 Glock .40 that chokes about every 6 rounds or so. It has only a few hundred rounds through it total, and it's really kind of a POS.
I did pay attention to that. Neither of her two mags behaved any better than the other. Her Glock is farked and needs to be fixed was my conclusion.
Every other Glock I've used has been 100%, as has every other Springfield XD I've used/owned. But both brands have failed me, and so I don't read about these torture tests with a sense of awe.