Officially no.
Loads of bands in music mags have more or less confirmed they're playing except from the main headliners, but realistically we all know who it's going to be ie Kasabian, Arctic Monkeys, Arcade Fire etc...
I've already seen The Twang so there's only Kings of Leon, Maximo Park & The Gossip I would like to see there in the whole 3 days so I'm glad I didn't go for it!