Like the author, it seems many commenters haven't read the memo...
The memo never says anyone is inferior, just that there *are* some biological differences in aptitudes and preferences that may influence who *choses* to get into computing in the first place. He acknowledges that there is huge overlap between male and female populations. He acknowledges that bias still plays a role in hiring. He explicitly says everyone must be evaluated as an individual, with respect, and not based on their group membership.
In short, anyone screaming racism, sexism, or calling this guy an asshole needs to work on their reading comprehension or their tolerance for ideas other than their own. Civil discussion should not be met with shaming and punishment.