<< The score on hotornot.com is simply a percentile ranking, so I'm fairly certain you'll NEVER see a 10, simply because you can never be in the 100th percentile. However, you can be in the 99th percentile, and thus 9.9 is the highest. >>
Yep, for someone to actually be a 10 there they would have to be the perfect body image of every single person that votes on that site, you know how impossible that is? I don't think you could put up a supermodel on there and get a perfect 10.
As for most of the other scores there, i've said it before but its mostly lame, a girl shows cleavage and she's already an 8+ when she would have been a 6 before, shows you how many people surfing that site are pretty hard up for anything. I've seen 9.5+ people that friends have sent me links all confused about that really would be a 6 something on a good day but they are in a half top leaning over, instantly they are the hottest thing on the planet.