There are differences in means. What this article is saying, is that when it comes to sexuality, differences are much smaller than men have been saying and, for some variables, are nonexistent. Modern research has shown a convergence of sexual attitudes and behaviors.

I don’t think there’s any evidence that a random woman’s brain can always be distinguished from a random man’s brain. In fact, based on low effect sizes for every difference I’ve seen, I’m thinking it definitely cannot be distinguished a large portion of the time.