Agree. Which is why I try to focus upon the medical model in an attempt to understand that is condition we call autism has several elements to it (anatomical, physiological, immunological, genetic, epigenetic, etc.) and so far, the primary focus has been upon the secondary behavioral components, not the cause(s). I would love to be able to get this diagnosis out of the psychologist's office and into the geneticist's and neurologist's office, or some combination, thereof. Reviewing the scientific literature, not the psychology literature, there is an attempt at describing all these differences, and the evidence is building its case. However, as you've suggested, there's enough heterogenicity between subjects that it makes categorization quite challenging. All I've been able to suggest, in terms of describing these differences, is that I will say something to the effect of "there is a subset of autistics that...." in order to point out to people that we are individuals.