It's hard to tell. What is there to base it off? Someone can write complete shit (e.g Quanchi) but be a fairly extroverted and "attract" people so to speak (not that it describes Quan at all lol).
I'd say the vast majority of people on these forums are introverts by far, but that doesn't mean they necessarily have crappy social skills; they just prefer to keep to themselves.
Re-ask your question.