I guess some things have changed, some things haven't.
When I bought land in late 2004, I had four-six weeks to begin construction. Once I had spent a week at the Street of Dreams, selecting every detail of the house, construction began within five days.
Closing was scheduled for 90 days after that. I asked whether there would be any slippage of the closing date, mostly so I could lock in my schedule better. "No," was the absolutely concrete reply! I didn't really believe them, but I did close on that 90th day.
I had a week to identify problems. The half-dozen minor, mostly cosmetic, issues were handled on the spot either by the builder's foreman or by others he summoned "at once" over his Nextel link! I was in awe that whole day.
SWR