Geez yeah, I think the G19 even has higher capacity than a double-stack 9mm 2011, but there the G weighs probably 1/3 of the 2011.
Ever get in and out of a car all day, in a 10 hour shift, with a 1911 on your hip? The weight/energy savings alone, in that 10 hr. period, is THE largest factor that agencies choose polymers.
However, I digress from the OPs thread. If they were both made in 1911, the USAF would be Glock by now. What has been the hurdle for Glock? They already have a customer base bigger than another Mil contract, to justify a team ($$$) that will specialize in jumping through the DOD hoops. It would be a nice feather in their cap, but they do not need it.