Check out this game, apart from one player, everyone in this game is 2,100-2,400 Elo. Custom Dominion draft game on eu-w, which lasted 30:24 minutes. My longest Dominion game. Had a couple close to 30 minutes, but none that passed it.
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Hmm, I had a 32 minute game once. Holy freaking Fiddlesticks that game was amazing fun.
Anyway, grats to the OP.
Now you know the feeling of having those to-the-wall nail-biters. Feels good, don't it? ^_^