At the Death Bowl Tourney, there's only OT in the finals. Timers aren't used until OT, and then its a 2-minute turn limit per player just to make sure we wrap up before the day ends
Everyone at the games I've been in has thoroughly enjoyed Death Bowl with the 2-minute timer, and in fact everyone has ended their moves before the 2 minutes are up. Everyone just jumps right into making their most important moves, some backfield players frequently get forgotten, and it's fun mayhem all around.
I'd heartily recommend Death Bowl with 2 minute timers from the start. Maybe 3 minutes for the first half so everyone starts getting used to the environment.
Cheers,
Mo