What is the “norm”? Statistically that word means that more Glocks have problems than don’t have problems. Is that what’s being claimed? Because if so that needs to be quantified more than by anecdotal stories on the internet or even within a shooting class. I can see how it might be a “norm” that at least one Glock will have a problem at some point during a class, but extrapolating that to most Glocks requires a higher standard of proof.
All people hear is about the bad incidents online and so it becomes expected, and then it becomes a confirmation bias.
If everything goes right, no one says boo. If all you hear is the bad, than that’s what you expect. For every Glock that may have problems there are at least 10 that don’t.
Likewise there were always Glocks that had problems, the internet just amplified the noise. I’ve owned Glocks since the early 90s, they’ve all experienced malfunctions, especially within the first 500 rounds.
I certainly agree that Glock problems are increasing as bean counters get involved, but the notion that more Glocks have problems than don’t is a overbaked.