2ukenkerl,
You're incorrect, Gillberg's includes the possibility of the delay in the acquisition of speech; it happily allows one who develops speech, albeit delayed, to have the AS label as they catch up to their AS peers. It's not needed for a diagnosis.
Here it is (a psycho at Attwood's told me that the "latest" research states that many individuals with AS had delays in the development of spoken language, but they caught up--those who don't catch up are then labeled with autism):
Quote:
4.Speech and language problems
(at least three of the following)
(a) delayed development
(b) superficially perfect expressive language
(c) formal, pedantic language
(d) odd prosody, peculiar voice characteristics
(e) impairment of comprehension including misinterpretations of literal/implied meanings
The 40% might have been from Professor Attwood himself that you viewed, as the aforementioned psycho who told me such worked for him.