Earlier quoted context omitted.
His fund lost massive amount of other people's money over the long term. (Guess he didn't have enough skin in the game.)
Where are you getting those numbers from? The most reliable numbers I could find where in this WSJ article: http://www.wsj.com/articles/SB118429436433665637 which claims that while his fund may have under-performed other funds over its lifetime and suffered a couple of years of modest losses during a period of stable growth, it did make massive returns during the dot.com crash which was kind of the funds raison d'etr…
http://www.businessinsider.com/wait-before-you-invest-in-nas...
Plus the fact that he started an new fund in 2009 that essentially was relying on hyperinflation to make their returns;
http://www.wsj.com/articles/SB124380234786770027#mod=testMod