I've played at least 5 today. Basically, its a normal match, but everything is twice as fast as usual. You shoot twice as fast, run twice as fast melee twice as fast, etc. the time even goes down twice as fast to (making a normal 10 minute match last for 5, but since you're moving at double speed it balances it out.)
'Twas wierd. --- All Things Require Sacrifice. The Truth Will Set You Free.
I've played in sped up matches and slowed down matches. I think I only played through one sped up match all the way. I just leave the game if I find any now. --- Currently doing Console Mario Kart run: http://youtube.com/user/TKrazyO