His simple explanation is that–at least in the case of Lending Club–no individual loan is better than another. He argues that the marketplace’s risk/yield ratings create fair pricing (all loans are equal when risk and payout are factored in). Because of this he argues  there is no way to cherry pick favorable  loans, and that computing speed doesn’t matter:

http://www.forbes.com/sites/stevenbertoni/2014/05/12/no-hedge-funds-arent-hijacking-peer-to-peer-loans-says-lending-club-ceo/