There is absolutely no way Yeasayer is on the main. Sigur Ros may deserve the Animal Collective spot in your mind, but when has the #4 led into the headliner ever? In fact, when has the #2 NOT led into the headliner unless they are an EDM act, leaving the #3 to lead into the headliner? On the craziest day of the festival, I think the only undisputed thing we have is Postal --> xx --> Phoenix.