Yes and I think that, if I do have it, then they are even deeper into the specturm.
My mother always interrups and derails any conversation into a sermon about the objective's in life, health, etc. . . It seems like a recording that starts playing always about the same two or three things and if you try to get a word in or show any impatience she just raises the volume. Her speech is shrill and has intonations like she's reading a kiddies book. She has no idea how practical and social things have to be dealt with, sometimes causing difficult situations. She depends on my father to do a lot of things; for example, she doesn't drive a car.
One striking thing is that I haven't seen her change over time. I myself have learnt to notice myself beginning to go on and on about something and SHUT UP (meh. . . quickly finish the point) at (say) the first impatient glance on the listener's part.
My dad seems as aware of unpsoken signs like nods, glances, pauses at specific moments as a rock. I have noticed this as of late when going over social situations involving us both. In retrospective, he has systematically made mistakes in this area. The fact that he likes mainstream sports has helped him though. He used to be a conscious top student and I'm told he was very shy. He was, again, popular in sports though.
They both seem to have very little social life (and/or few long term friendships) despite success in other areas.
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I forgot to add:
I never knew my grandfather much but I know he was forced to major in something he didn't like. . . so he spent most of his free time in a room of his own solely dedicated to tinkering with electronics. I remember going in there: it looked like a typical mad scientist room cluttered with gadgets, manuals, wires, and some devices of his own making I wasn't old enough to really understand (I think he enjoyed very much going over each of these each time I was over).
He was also known for his poor reactions, temper and eccentric behaviour overall; even from the perspective of my parents. I remember that some of his hostile reactions were rather sudden.
He was yet another good sportsman, though. Apparently, his brothers were too and had competed in different things. I don't know specifically about my grandfather but he did do some swiming feats and his sheer prowess at it was scary (I think) once he was over 70 years old.
Though I'm not an amazing sportsman myself, I did that aspie test with the graph and it's skewed (though, not extremely) saying I have physical NT traits and mental AS traits.