Fred,it depends on how many players the aces are against. Against one player it is over 80%(I think about 85),but the more players,the lower it gets. I have kept tabs on my victories vs losses with AA since the year began. I have been dealt AA 21 times this year and I have 11 wins and 10 losses. Not great. Strangely enough,out of those 10 losses I have been pair over pair and lost 7 of them! I know when I watch WPT and I listen to Vince rave about AA and AK,I always wonder what the fuss is.
I don't get excited anymore about them anymore until the hand is over.