The examples that answer the question "why aren't there more women" also puzzle me. The given causes x, y and z seem underwhelming to me. A guy thinks "if the tech is the stuff you care about most, you'd just tune the idiots out". From this perspective, hearing women say "I'd rather crack open a good book" simply doesn't compute. Incredulity can even turn into a little bit of anger: how can you be in this field if you care so little for the stuff it is about!
It is perhaps fair to conclude from this anecdotalish evidence, once more, that men and women have different priorities in life, and they carry this baggage along with them wherever they go. It also means that if we are going to make a community of both men and women in equal numbers, it means also that the community itself must change to accommodate women who obviously are looking for very different kind of things from open source.
It's times like these I almost hope that all the discussion will amount to no practical changes at all. We know and understand the status quo and can work with it. Will we improve it, or make it worse, if we try to force it to change? Why can't women just find their place first among themselves doing whatever they like doing, and later when there are a lot of them, perhaps we can make these spheres interact and even merge to whatever degree makes sense.