Do we know what fraction of active users has over 1000 karma? As someone with forty-two karma currently who only comments rarely, it's a bit scary to know my comments will face moderation to be posted, although it will surely increase the substance/message ratio, which has seemed to be decreasing some.
It's not so much that I care about the karma, as I'd post more if I did, but more that if someone asks a question that not many other users care about, but I happen to have unique insight, I'd hope that my message can get through to them. :)