One of the hottest debates in the study of the autism epidemic asks a simple question: if the rise in autism incidence isn’t related to a new environmental trigger(s), then where are all the autistic adults? New research suggests that autism in the adult population is found at similar rates that it is for children. Of course, like any study, this one has its limitations and should be noted. However, the findings bode well for the explanation that greater awareness and expanding definitions of autism have propelled the recent increase in diagnosis rates for children. See the article from Time magazine here:
http://www.time.com/time/health/article/0,8599,1927415,00.html