Like white racism, I think the drivers are cultural, not inherent to the person or their gender.
But keep in mind I'm not speaking in absolutes. I'm not saying there are no differences in thinking due to gender. I'm just saying there are certainly not as many as we think they are are.
Most of these differences, I'm arguing, are defined in our culture; the way we are raised the media messages we are sent, etc. Not all cultures see the same differences between men and women that we do.