I think it all depends on how you treat a gun.
I have heard horrible horrible things happen to glocks. Ever heard about the one that sat under a dumpster for 2 years and was so rusted they couldnt pull the slide back on it?
Nope because you probably dont spend time on the glock forums much.
HK has had some horror stories to.
Just to get clarified... I heard that the P99 was co designed by a guy who helped glock enginer there guns. Glock hasnt changed its design in how long? Just a few mods, a testiment to its reliability, and maybe the urge to be frugile at the factory.
Walther has changed many of the outward design fetures to make things better and aparently. Apparently this happened with most of walthers stuff.
Needless to say I broke 20,000 rounds broke a ejector rod and the thing fired pretty damn well for being broken. Tell me how many other firearms can have the ejector rod break and work 99 out 100 shots after 20,000 rounds. (I broke it with a after market mag).