In the 2012 election, I wandered in at the usual time just before 5 pm, two hours before the polls close and got out in half an hour with ballot #1211 for the precinct. For a mid-termer, I figured half the time and half the turnout would be more than acceptable.
And it was a little busier than that: I cast #783 at 5:07 pm. There was no line, really, but there was only one booth when I signed in, and fortunately, I’d already made up my mind on most of the races. (I admit, I totally forgot Lieutenant Governor.)
A few folks had address or identification issues, but so far as I could tell, no one at the time was being turned away: provisional ballots are not exactly routine, but everyone on site knew the procedure, which is always a good thing.