@Adam@Adam: I appreciate your argument, but I respectfully disagree.
I find that now there's a flood of answers within minutes. Yes, it used to be one fast and several later, but now it's 2-52–5 immediately, often with very similar information, often with shallow, trivial information. I picked a random question current at the time of this comment, and you can see this effect for yourself.
These linger around forever. Usually people don't down-vote, perhaps because of the combination of losing rep and having just 30 votes per day.
I also disagree that "if someone is looking for the information later, they'll read all the answers." I don't think people carefully look through all the answers, and again I don't think they'll be down/up-voting as they go.