Of course, cause nobody gives a shit if they play for four hours straight cause most of the crowd is blazed out of their head anyway.
I dont know too many radio bands that can play for several hours in a party atmosphere...a few can, but the 'jam bands' tend to fit the bill perfectly.
Too bad theres no word of Modest Mouse, The Dead, Trey Anastasio, Tool, Damien Rice, U2, Beck, or Mike Patton doing some sort of NYE show...