In the 2 tournaments I've organised so far (casual ones, 6 players, 3 rounds, divide a battlepack with the winner getting first pick) i've run in a bit of a problem.
The first tournament, about a month after we got our core sets, was a Best of 3, 1hour and 15 minutes a round, which I thought was sufficient. (but since I tend to play fast and prefer more aggressive decks my view was a bit skewered)
Aggressive versus Aggressive an have best of 3 decided in half an hour, while Aggressive versus most Control decks should suffice within the timelimit but when a Control encounters another Control games can last over an hour. (when it did I ruled it counted for the complete round)
The second tournament I decided to let 1 game determine the round (I left it at 3 rounds because it leaves a clear winner) which led to some rounds being finished for certain players after a couple of minutes.
So i'm wondering which format/system/timetable/scoring system you use for casual tournaments?