"One of the commonest mistakes made by clinicians lacking experience with autistic disorders is to observe the person's clumsiness, or reading difficulty, or poor attention span and to diagnose that as the main problem. They miss the fact that underlying the obvious difficulties seen on the surface is an autistic spectrum disorder with the characteristic social impairments."

So you have decided that this means that every clumsy or socially backward person you have ever known is autistic.

That's what I thought.