I'm not claiming that my argument is correct and hence I don't need citations. I'm merely claiming that it's intuitively plausible enough that it doesn't make sense to dismiss out of hand as obviously wrong.

I'm responding that lots of things are intuitively plausible, because that's an incredibly low bar. When you're trying to make decisions about how to educate people for example, leaning on presuppositions that are just "intuitively plausible" is lazy thinking and I would argue that for any serious matter you should dismiss out of hand such lazy thinking.

Well, I agree :). I don't want it to appear that I'm claiming there are differences in brain structure on average between men and women -- I'm just curious what science has been done.