I've written several posts already on here regarding the issue on the shortage of women in science, and particular in physics. BBC news has another take on why this is so in a news report.
I suppose the issue of "nature versus nurture" won't go away anytime soon. I still think that this is not relevant. Having a different way of looking at things has never been a setback. In fact, in many cases, it has been an advantage. However, it requires people to be aware of that. So what if women are genetically programmed to have a different way of seeing things? The fact that there ARE women at the top of some fields of study in physics means that (i) they can do science/physics and (ii) their different way of looking at things CAN be to their advantage.
So even if it is "nature", it is Mother Nature's way of adding diversity to the gene pool.