Just take a look on some articles on searchyc.com.
I'm not saying that the quality today is any worse than the quality a year ago (it's very difficult to judge that metric), just the submissions and comments are different, which is to be expected of a growing community.
I'd say that is a good thing. Since coming here I have started to carefully consider posting each and every time.
I like to think my post quality has gone up because of it!
(also, the majority of commentors are not on the leader board so this effects only a minority)
But it is only when Nate Silver unveils PEKOTA that we will finally know the ONE TRUE SCALE on which greatness is measured. [1]
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[1] Poster Empirical Karma and Optimization Test Algorithm
I presume "total karma created" is all of your karma, plus all of the karma accumulated by other comments that are in response to your comments and submissions?
Wait, don't tell me... searchyc already has a page for this, right?
I'd also love to see that stat broken down by link destination instead of by submitter. My money is on Techcrunch, though 37signals might do well in the PACK rankings. [1]
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[1] Per-post Average Creation of Karma
Okay, let me see what I can do with this one. You score one karma assist when a given user upvotes your comment immediately before or after upvoting a comment higher up on the same branch. The idea is that you can help other comments rise in prominence by adding your comment to them, thereby increasing their value. Thus, if someone upvotes your comment above and upvotes this comment at the same time, I get a Karma Assist.
Naturally, you can't Assist your own comment, because everyone knows that's a sin.
But I worry that this definition still isn't arbitrary enough. You actually might be able to compute this with an algorithm, which ruins the humor value. If the jokey analogy to NBA assists is going to hold up, Karma Assists need to be both poorly defined and arbitrated by bored human minions with a serious conflict of interest:
http://deadspin.com/5345287/the-confessions-of-an-nba-scorek...