I've heard that the 10mm "Baby Glocks" have ferocious recoil. The 10mm is a rather potent round, and firing it out of tupperware....
I think this posting just absolutely requires a range report!
Seriously, I'd be interested to know how badly it kicks (or doesn't), as .45 ACP and 10mm would be my two choices if I ever get a Glock for personal defense.
I'd love a 10mm 1911, but really don't have the wherewithal to pay for one/buy the parts to build one right now.