I think maybe mods/admins are getting disproportionately plus-voted compared to how often they say or do something good. Not that I'm jealous with my measly +2/-1, oh no.
Edit: For example, moonlit (I don't have anything against moonlit, I tend to agree with his posts most of the time, but that's not the point) has made a total of 9 post since the switch to this forum 8 days ago, with an average of 14 words per post, and yet has gained a +7/-0 rating.