The most significant of the other "signs" is his speech as well. He is delayed in his speech to the point that he is now seeing a speech therapist. He is 3 and 4 mos. and up until a couple months ago, he had fewer than 20 words (if that) and was not even close to putting them together to communicate. He would repeat many things, but only repeat and not add to his vocab. Since his parents and ped. finally acknowledged he needed work in this area, he has improved quite a bit, but is definitely still quite behind in his speech. But his communication skills are increasing daily. Yay!
Also, he is socially very behind according to standards (including of course the fact that he did not communicate with others in language, which is changing now). On a developmental assessment test, he could not complete any of the social items listed and only one or two of the language development ones. Of course this could be attributable to the fact that his parents do not put him in social situations with other children-no play groups, no friends with kids (except mine), my sister even will pick parks that don't have other kids at them.
This also has changed now that they have realized that, while they may not like socializing with other kids and their parents, my nephew needs that.
Other than the verbal and social issues, there is not a lot. Jusy a couple random things, ie he is very particular about where things go-change is not good-but mostly it's just stuff that occured to us as we were reading descriptions of autistic behavior, not things we would have considered problematic otherwise. And then my sister is not into natural living so her son has been fully vaccinated and exposed to many other risk factors as well. You know how you can diagnose yourself or a family member with just about anything if you read a long enough list of symptoms? It was like that.
But that's mostly it and his ped. didn't seem to think his "problems" weren't anything a speech therapist and some time with other kids couldn't fix.
Does your son have other stuff as well? I know what you mean about labeling him-my mom was convinced my nephew was autistic because of his behaviors and that really hurt my sister's feelings. I hate it when people make ignorant judgements about my children too! People are so quick to form opinions from so little information sometimes.