Technically, yes what he said is unscientific in the sense that he didn't conduct a long-term study. However, the guy has a degree in molecular biology so it's not as if he's pulling shit out of thin air to justify his stance -- that's grossly misleading.

While I don't agree with everything he said, there's a lot that I feel is very fair. It's sad the media wrote him off as a misogynist. Misogynist don't write pages of suggestions on ways to encourage women into STEM and into leadership positions.