I'm skeptical that happens very often. The only wiki answers I've seen have been hugely popular with dozens of answers and hundreds of votes. Maybe it happens

I'm skeptical that happens very often. The only wiki answers I've seen have been hugely popular with dozens of answers and hundreds of votes. Maybe it happens outside of that, but it's definitely not how it "usually" works, IME. Most of the questions I see on SO have maybe 0-5 answers, and the average number of votes is something like 2. If you're lucky there's an accepted answer and/or an answer with a clear majority of votes. I've even seen cases where the accepted answer is wrong, while a more upvoted answer is correct.