good story, and glad you pulled it off! i was kinda in the same boat, learning to use a new mackie DL1608 on the job after being an old-school mixwiz guy forever, and doing it with zero soundcheck time while playing in the band to boot!
(now i never want to go back, and the mackie isn't even at the level of your QU16!)
all i can add is that as far as i'm concerned, when you guys rolled up and the space wasn't cleared when they said it would be, all the pressure on you was off. you would of course all do your best to set up and start in a timely fashion, but ultimately at that point you start when you start and they get what they get.
You are right. In fact, the playing time was definitely cut short - but I get stressed out if I feel rushed and I like to be set up, sound checked and enjoying a beer at least 20-30 minutes before show time. Now I am familiar with the QU16, I have no problems with the extra learning curve so all is good.
BTW, the band played the same place last week and the area had been kept free of guests and we loaded in much earlier. However, It was a different manager on duty and a friday night instead of saturday. Less customers ....Upside - easier set-up, downside - smaller audience.