I'm sitting at 87% positive karma, and looking at recent comments and posts, apparently that's actually pretty low!
Almost all the users I looked at had at least that much positive; I saw one or two out of a dozen with less.
I'm a little surprised but I'm not sure how surprised I should actually be, since I already knew that we have a great community that keeps people around who post good things.
It seems that if you look at the column on the right of the page, you can see upvotes and downvotes separately for recent posts. The same [n, m] format is displayed for recent comments, but it doesn't seem to actually sync with the score displaying on the comment. This feature only seems available on the sidebar: looking at the actual comment or post doesn't give you this information.
Thanks, whoever did this!