One response to the glock kabooms and recals has been that since so many Glocks are in existance there are bound to be more problems. I do not think that this argument is valid considering that there have been much longer production runs of other very famous pistols including the German HK P7.
One doesn't hear about too many 9mm Glock kB!'s, either.
As far as "much longer production runs", it wouldn't surprise me if Glock churns out more pistols in any given six month period than there are in the entire production run of the P7, all variants. That's one reason the P7 has never been a big commercial hit; its high price reflects its less-than-easy-to-mass-produce nature.