I don't think he thinks that. At least not if we are to believe the memo.

However I do think many of the responses took offence with the idea of biological differences between men and women. And maybe rightly so, since some of them referred to seemingly good research showing that he at least overstated his claims.

What many of the responders don't seem to get, is that a good reply shouldn't dependent on whether differences exist or not. Instead it should tackle the question of how we treat different people equally. When should we try and level the playing field, and when should we accept that gender gaps (and other kinds of gaps) appear?