The 25 highest-paid hedge fund managers made a combined $21 billion in 2013
nytimes.com
nytimes.com
See http://www.bloombergview.com/articles/2014-05-06/billionaire...
Also, the S&P had its best year in 16 years last year, so you would expect people to do well on their investments this year. The thing that Warren Buffer is very critical of is that hedge funds get a lot of fees even in years that they do really poorly. That sets them up to win big when the market does well.
There is an illusion, cultivated by instutional investors and the people ripping them off, that instutional investors are very savvy. It is not always true.
Of course it can all fall apart(LTCM lol)
Plus the huge factor of their personal capital generating a sizeable chunk of this return at the same rate as their fund investor's capital.