I remember discussing today how 'constant improvement' -- a classic introvert value -- is an everyday concept in Japan. So, yes. I do think that there's a general self-selection effect regardless of culture, where introverts don't get as much of a say in social norms precisely because they are usually less involved in socializing, but that's just speculative currently.
r/Fitness does a weekly "Moronic Monday", a judgment-free thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. I thought this seemed like a useful thing to have here - after all, the concepts discussed on LessWrong are probably at least a little harder to grasp than those of weightlifting. Plus, I have a few stupid questions of my own, so it doesn't seem unreasonable that other people might as well.