Of his reasons, 1 and 2 are mistaken. If a startup with a single founder looks especially promising, we don't simply reject them; we get them to find one. And we have no bias toward consumer apps. Two of the most successful startups we've funded (neither is launched yet) are doing stuff for businesses. The reason we fund more consumer apps is simply that more apply.

BTW, we're soon going to announce a third plan B, which we hope will be a better alternative to this or Techstars: to work for a YC "alumni" company. While some (e.g. Loopt) are quite established, others are so new that you could be the first hire, which is very much like being a founder.