[dgabriel]

I guess the issue is why do people attend start-up weekends? Is it to network for professional reasons? To actually begin working with a team that may produce a marketable product? Or is it for the fun of going flat out on an interesting idea? It's probably a combination of these things, but if the first or second reason applies most strongly, then it's not surprising that the attendees chose to join other teams. More because of age than anything else.

Don't get me wrong, I think that there are certainly serious barriers within the start-up world for women and minorities. I'm not sure this is an example of that bias playing out, though.