Of course it's wonked. Personally, I was virtually unknown 7 months ago when I voted on the poll. And maybe what you're seeing is not "obvious" false modesty but how different people interpret being "popular".
SIDE NOTE: If 5 is actually 'average', then people are generally underestimating themselves. That said, the difference between 0 and 5 is probably a fairly small amount of popularity and between 5 and 10 is a very large amount of popularity.
Its maybe as arrogant to suppose being universally disliked as universally liked, I expect most people dont care either way.
I know there are people dislike me or at least what they imagine me to be from what little you can tell from posts on a forum, in that limited context I'm pretty sure of it. I'm confident about this because there's people here I feel that way about too.