Isn't it interesting there is a correlation within 5% of correct answers to positive posts and incorrect answers to whining posts. :w00t:
No, I don't find that interesting at all.
I also don't see the point of having a single bucket for "positive and/or educational".
In my opinion, positive posts ("great question!"), negative posts ("you suck!") and whining posts ("give me my point") are all an utter waste of bandwith, and I suspect most of the people who regularly write posts like that of doing it for the sole purpose of accumulating points. I hate it when I get mails from twnety different QotD discussions I am subscribed to, all within thrigy minutes, all because of a post from the same poster, and all contributing nothing but "good question", "got it right", "missed it", or whatever.
Posts that are useful are what you probably label "educational". Those include obviously posts that give (extra) information, but also posts that ask for more information, for an explanation, or for a clarification - those posts in themselves don't educate, but they (hopefully) trigger a response that WILL add information to the topic.
Then again - a post that adds information that has already been added a dozen times in the same topic would, in my opinion, again qualify as waste of bandwidth.
(I also can't help wondering how you would qualify your own post. Or my response to it in this post. My qualification would be "waste of bandwidth", for I don't really see how discussing statistics of posts adds value that is relevant for the average SQL Server Central visitor.)