Longest game was 4 hours, and lately I have had many over one hour, and a few over 2 hours.
This is why I, and many of my friends, are taking a break from Transcended 1v1 PvP. Yes, not all games last longer than an hour, but with the new tanks like ice in particular, you may be in for a super long game, which sometimes I'm up for playing, and sometimes not.
It would be nice if there was a way to agree to a mutual draw after one or two hours of play.