Well, PDD-NOS is on the Autism Spectrum. I know that some kids on the spectrum also have motor tics. It is a communication/social disorder.

According to the Tourettes DSM it doesn't talk about severity just that they have at least one vocal tic and several motor tics that wax and wane and be present for a year. Is that right or is there more to it?

The most different motor tic (if that is what it was) was the echopraxia. He will even copy someones voice and influcuation. Last year he had a Forest Gump voice because he was copying one of his classmates on the spectrum. He copied a kid from preschool with a speech articulation problem and you would have thought he had one too. He copied a little girl in preschool with Angelman's syndrome.