Okay, I'm not a therapist, but I'm about to play one online. (That's sarcasm.)
I believe most therapists, regardless of their educational backgrounds, are now quite familiar with the terms "Autism Spectrum Disorder" and "Asperger's Disorder / Syndrome." It takes a lot of hubris on the part of a patient to assume that he or she knows more about autism than a clinician. It takes even more hubris (or something else) to self-diagnose yourself with any mental health condition.
People wonder why I think autism is approaching the level of "trendy" once reserved for ADD/ADHD need only read any of the online communities for more than three weeks.
Yes, there are a lot of people with an ASD in these communities. There are also a lot of people looking for a mix of explanation and excuse for whatever social difficulties they experience. I fear there are a lot of people seeking an autism diagnosis when there is really a much more complicated problem present. If you want / seek a diagnosis of autism, I wonder if there aren't also more pressing issues to address?
Understand that I am resistant to the label, while recognizing I have "autistic" traits from a very real, physical trauma. I just think a lot of people are seeking the Asperger's label when they might be better served forgetting particular labels and dealing with their social challenges apart from being categorized.
Why not deal with the social issues and not keep asking for a label? What am I missing? Does the label suddenly solve problems? Or does it create yet more expectations of difficulty and oppression?