I can't agree that the article is "excellent". It is scientifically wishy-washy - for example, it states that "These people [people with XY chromosomes and the SRY gene] usually have testicles which are often inside the body." It is actually extremely rare for testicles to be inside the body. She presumably means people with 5ARD, an enzyme deficiency.
The article also jumps about all over the place, never really gets to grips with what makes someone male or female, and quotes experts without establishing their credentials. It's a great example of someone having picked up a lot of facts, but being unable to present them as a coherent whole because the framework of real understanding is missing. She may get there yet, but at the moment her thinking is too jumbled to be very helpful to people who also lack a clear understanding of the issues.