YC also has a way higher "full yes" rate -- 25-50%! -- than any VC or angel, at the interview stage. VCs seem to cull at the interview (assuming you're smart enough to have contacts, you should be able to get an interview; if you're really good, you should get a 1-2 partner interview vs. associates or principals); YC culls using the applications first, and a single round of interviews with full partners.