Well I guess I'll be the only one saying it: this entire article reeks of male geek condescension. I didn't know Clay Shirky was a feminist-apologist but I certainly grow tired of messages like this delivered from male bloggers about how women need to change, to do this or that or the other. This is a thin rewrite of a post that appeared I believe here on HN a few weeks back; only that post was actually written by a woman. These outside-looking-in pieces that male bloggers do are almost always a bad idea.
I don't think Shirky is a "feminist-apologist" so much as that this kind of thinking has become a bit of "received wisdom" in liberal, especially academic, circles.