PG's reply here is still consistent, if we assume that hackerschool is meant to train effective programmers, not so much star ones. But you raise an interesting parallel, though. It seems that a premise of YC is not so much to train great startup founders as to distil them out of the world population. I don't know whether that the former is hard, inefficient, or impossible, but I'm sure a lot of people would like to know. See https://news.ycombinator.com/item?id=6091086 for a special case of "waking people up".