I have noticed this expressive similarity in a few people. admittedly i do not know that many autistic people. Other than several family members i have observed autistic characteristics of, i Personally know of only myself, and a girl i went to highschool with.
what i am talking about is when you get these people to genuinely smile, it is a large, somewhat goofy expression, a momentary complete indulgence of an emotion of amusement. The expression appears to border loss of control of it, though it usually lasts only a couple seconds. Very different than the smooth balanced smiles of neurotypical individuals.
I had known first of myself to do this, long before i knew what autism was, and used to hate it the few times i by chance saw myself smiling in this way in a mirror, or on a recording. I thought it looked so stupid.
Now that i have seen other autistic people display this expression, i have more positive feelings about it. It is as though it is an expression i can actually understand, unlike the many expressions of the NTs which i usually misinterpret. I hate the term NT by the way, though it does serve an identifying function.
At one one time or another I have seen Alex, Jack, Kirsten, and most recently Kerry Magro, which spawned my desire to share this observance and discuss it. I have not interacted a whole lot with the girl i know from my highschool on the spectrum, we have been in mutual circles of friends, and she is rather more socially withdrawn than i am. I wasn't aware she had a diagnosis, but she is a friend of my wifes, and she spoke with her after we identified the aspergian condition in myself. However i do think i have witnessed a similar expression a few times of her.
Anyone else noticed this before, or can see what i am speaking of after considering it?