the excepcted % of wins in a heads up tourney

[Sarahanj]

Lately I started to play hu tourneys on the internet. How many % should a good player win?

[meow_meow]

Probably the wrong forum for this.
To give you a quick answer though, with standard blinds a la stars or UB, at the $20 and below buy-ins, an excellent player might be able to win 65% or maybe 70% against clueless opposition (assuming that for time value purposes he doesn't pass up reasonable edges just to pad winrate).
At the $100+ buy-ins, I think 60% would be phenomenal.