If someone's hand gestures are actually useful then it's not a problem. But if it's aimless gesticulating, it can distract.
I'll use my hands to try to illustrate something, but if I'm just talking, then my hands don't join in. Instead, they're usually stimming. Either fidgeting with a thing or stroking my jeans.
It does remind of one time with my mother. She was talking to a friend of hers, and her hands were flailing about. I reached in and pinned her hands, then said "okay, now talk." (Nope, nothing at all strange about reaching into a conversation between two other people and pinning one's hands. /eyeroll) Mom gave me a dirty look, but didn't tell me off like I probably deserved. She resumed talking, and got to the word clockwise. With her hands pinned, she wound up tipping her head all the way to her shoulder to illustrate "clockwise". At that point I literally fall on the ground laughing.
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Your Aspie score: 186 of 200
Your neurotypical (non-autistic) score: 17 of 200
Quiz updated, now even more aspie