Read something else interesting the other day... to paraphrase:
If the child has NO motor-skills issue, then the child is not Aspie.
It is one of the original definitions.
So... a child can be severely impaired in many areas, but a star athlete... and they would either be ADHD or Autism Spectrum Disorders (ASD), but not Aspie.
There is no direct ordering of severity of symptoms from ADHD to Aspie to Autism Spectrum Disorders (ASD).