Ummm, naturally 3-6 minutes, people who 2HKO me or I to them are always slow.
As long as it takes to complete the game. It doesn't matter how fast you go in elo, just don't stall or wait to the last second of the timer to make your move when it's a sure loss. It's not fairplay
I'm forced to play the whole game out because I use Freaks D: