Most mutual fund managers fail to beat the market. (About 80%)
A good number of hedge fund and private equity fund managers do beat the market consistently. They are able to do this because they have much more flexibility than mutual fund managers (They dont have to keep X% of the money in certain types of stocks, they can buy and sell derivatives, they can use leverage, they can short things)
You'll never know what % beat the market because they are not all published.
Sadly you need $1M or $200,000/year income to invest in these.
Many of these funds dont take under $5M.
A good source is Trader magazine - it can be picked up at BN/Borders, etc... A great read were the 100 highest earning traders about 2 or 3 months ago. Some very interesting funds represented. Some making 30+% yearly for 8 or 10 years.
-Sean