Problem with Graham is only that Buffet and Lynch, Tempelton Fisher and several refined the metod and been vastly more succesful by doing so...:-), Doesnt imply that you cant grab his teachings and further refine them to your own set of tools....
I know. There are still 2 obstacles they have to overcome IMO. The cost of feed and training all those people. They probably have to build a school or training center with a dozen class rooms.