I find myself disappointed by this blog post. The second paragraph amounts to a sexist version of "I'm not racist! I have black friends!" Then he follows up with statistics comparing YC to the general VC market. Fine, you do better than most. However, not the worst does not mean not bad.
He comes closest to saying anything of substance with the paragraph: So how would you cause there to be more female programmers? The meta-answer is: not just one thing. People's abilities and interests by the time they're old enough to start a startup are the product of their whole lives—indeed, of their ancestors' lives as well...you probably have to go back to the point where it starts to become significant.
The fact this post mentions no group currently working towards what pg says should be done really bothers me. It appears he has done no research. Groups exist which work towards that very goal of getting girls interested in programming so they become women involved in tech.
What about Girls Who Code? (http://www.girlswhocode.com/)
What about Black Girls Code? (http://www.blackgirlscode.com/)
How would you get more girls interested in programming? I don't know much about girls specifically, but I have some ideas about how to get kids interested in programming.
This came off similar to how Stephen Colbert jokes that he "doesn't see color". If you cannot be bothered to understand the very group you hope to address why even bother? How about addressing the fact that sexism related stories get flagged off his very own website with surprising speed (either manually, or by his own automated algorithms)?
I don't think he should have written this post. He put lots of effort into writing, but seems to have put very little thought or research into the actual subject. I guess he felt defensive about his character being sullied but I think he sufficiently addressed that issue already.