We had the misfortune of renting a house next to a new build going up this summer, multi-million dollar waterfront homes. It was truly amazing to watch the speed of these guys, they framed up and sheathed an entire 6000+ sq.ft. home in 3.5 days. Roof was done in one day, windows in 1.5 days. Very competent crews, although they were noisy as all hell. I was an expert on Ranchero music, by the end of the week, but those guys worked hard.
Most entertaining was watching them move ladders along a wall, hopping like a pogo stick while standing near the top.