Do you really think so? Dancing is a highly social activity for extroverts that people with any hint of autism spectrum rarely do, and the last thing I would imagine about the LW community is to be less autistic than the average. I would say some amount of it is almost a precondition for rationalism: there is at least a slight autism in thinking a belief is something you form yourself, individually, on the inside, based on evidence, not an inner echo simply reflecting the socially expected opinion. You need to shut yourself a little bit from social life to have that, to make your beliefs really individual and not social echo based.