I pumped the cheap steel cased wolf thru my Glock 19 to see what would happen. It worked fine. I have fed all kinds of ammo thru each of my Glocks, and they have eaten everything. Several thousand rounds, and not a single hiccup from any of them.
I shoot IDPA and many of the shooters use Glock 19 or 17s. No one that I talked with has ever experienced any problems. I’m sure the M&Ps are fine guns too.
I've certainly seen issues with Glocks - but they are typically related to ammo, magazines or technique, and can nearly always be corrected with some attention to mag springs, recoil springs, or ammo.
For the vast majority though, they are as you state - dead nuts reliable.