My business became profitable this month, but it's not the same as the idea I applied to YC with. Not sure whether that counts or not, since apparently half of YC folks change their idea anyway. To be fair though I don't think I could have done it without going through Seth's MBA program, which was a lot more hands on than YC. (In terms of more contact hours, more formal instruction, more varied curriculum, more opportunity to find a diverse set of mentors, etc.) Also not the same co-founder, but the co-founder I applied with wasn't the problem.