I'm trying to find the thread where I wrote that!!! But you're not quite there:
As you approach 500, your vote weight increases dramatically. So someone with 200 points is much higher weighted than someone with 100 points. 500 is much greater than 400, etc. After that though, it slows down. 600 is greater than 500 but not as drastically as 500 is greater than 400. At 5500, you have the same vote weight as all moderators do. I think admins are a little higher than moderators and owners are higher than admins.