Diagnostically, they always say speech delay. This has been called into question.
According to Attwood, those diagnosed with HFA in childhood almost never partner up later in life. But there are exceptions.
Many people think Temple Grandin is very HFA, rather than Aspergian. And yet, she now always says she has Aspergers.
The confusion seems to stem from the two different diagnostic systems.
There's a simple linear one which goes LFA--->HFA---->Aspergers---->Residual Aspergers.
This is seems to be based entirely on outcomes. If one holds a full-time job, lives independently, cultivates a few friendships, is from a distance, (with the street light behind one), indistingushiable from the NT population, one can get a psychologist to diagnose one as having "residual aspergers", and still receive social/insurance paid services for the likes of, marital counseling, addiction couseling, etc....
But then, needless to say, wiring is never mild. It doesn't go away, anymore than ADHD, or dyslexia goes away. One simply learns to deal with the world. Just as the NT population does. We simply go about it differently.
The other more nuanced system, which as far as I can tell is never used by insurance companies, schools, or most diagnosticians has parallel lines of low to high functioning for both autism and aspergers.
1. LFA--->HFA
and
2. Low Functioning Aspergers---->High Functioning Aspergers
Donna Williams is an exception to the stereotype of the HFA who remains unpartnered,. In her book, Autism An Inside Out Approach, pp. 274-8
She discusses the differences between autism and aspergers. She has HFA, and is married to a man who has Aspergers. Very interesting comparison, difficult to sum up quickly..... And entirely unsubstantiated by research, but by far the best comparison that's been attempted, as far as I'm concerned.
Buy the book, and support an autistic. We have dentist bills, too.