I tried to be careful on point #1 and stated it as "leans heavily towards startups with 2 or more co-founders". I think this was a reasonably fair characterization, as I don't think you reject applicants purely on the fact that they are a sole founder.

Point taken on #2 (since I don't know what the applicant pool looks like, it was easy to guess that you have a bias towards consumer internet based on past selections).

I think it rocks that you're going to make another path available for folks to join existing YC alumni. This is a great idea. Yet one more reason for folks to consider applying to YC in the first place (i.e. it can be a channel to find more great people for the company).

I'm continually impressed.