Since Stack Exchange doesn't support tables (hint hint wink wink nudge nudge knowwhatImean knowwhatImean), you can click the following link to obtain the...
Please answer with whatever SCIENCE you can extrapolate from this data.
Extrapolating wildly, we could say that while we only provide content above what the rest of the world does 40% of the time, visiting us is only "a waste of time" 11% of the time; 9 times out of 10 we'll present good information in a good manner thanks to the Stack Exchange engine and our voting.
Do we reward original research, good presentation and excellence in answering while downvoting answers that need improvements? Yes... marginally.
Now, while the curve isn't quite as steep as I'd like to see, it would've also been concerning if it was too steep. Voting is supposed to show the quality of a post, not the quality of a post compared to what's out there on the rest of the internet. All of these post scores are rather low and tag popularity certainly plays a role here (cough Hyperdimension Neptunia 2 cough).
If we just look at review score vs post score, we get a similar story.
