I was posting about this just now in another thread.
Quote:
In terms of non-verbal cues, NTs definitely have deficits in non-verbal processing if the non-verbal cues of autistics are set as the standard.
For example, when I make and hold eye contact with someone, what I am thinking is that I want that person to go away and leave me alone. This cue is always interpreted as me wanting to the other person to stay and talk to me.
When I am writing on my computer and stimming, that means that I can be interrupted, but I will be somewhat annoyed. When I am writing on my computer and not stimming, that means that I cannot be interrupted at this time, not at all, and interruption may lead to meltdown. When I am staring into space and not stimming, that means that I can be interrupted, but interrupting me at that point is like waking me up from an awesome dream.
So I think that yes, autistics do have an autistic pattern of body language that corresponds to autistic patterns of thoughts and feelings, and that these patterns are as non-intuitive for NTs as NT patterns are for autistics.
Another thing I have noticed is that my normal default face is often interpreted as "sad" or "depressed" by NTs, such as my mother, trying and failing to intuit my emotional state.