Bloomberg Hedge Fund Summit 2012 now features a talk with J. Tomilson Hill, Vice Chairman, The Blackstone Group; President and CEO, The Blackstone Group L.P. (NYSE:BX) Alternative Asset Management (BAAM). He manages $46 billion, and he advises on $20 billion more in assets. 12:07PM EST: Tomilson says that many big investors could be leaving industry because the equity markets are much more difficult. In the 1990s, with the higher equity returns, a long short portfolio was easier to manage. 12:08: Are products switching from Wall Street to small hedge funds? Tomilson says that anytime there are significant dislocations, the industry changes in various ways. The…