i've been to T for the last 3 years and every time i bought tickets before the whole line up is announced. i don't have a problem buying early cos of the amount of bands playing there will always be afew bands i really like, or if not its a chance to hear new bands and bands i haven't heard much of. i personally woundn't go to a festival just because a certain band was or wasn't playing. to me the banter of camping and being with mates, etc is just as important