I just did the community rating thing for the first time and I found it to be very inaccurate anyway. If i took into consideration the points given in the "Learn" popup I was way off from average community ratings but if I only considered the model itself then I was on track with the average ratings. I saw models with only one picture given high ratings (thought presentation was part of it) I saw models I wouldn't post for free given average ratings, I saw models with high detail and great presentation given average ratings... perhaps I don't understand, others don't understand the point of the system or it's ambiguous and not of any accuracy or use at all really anyway.
Test it yourself; consider presentation, accuracy, quality, uniqueness, etc and rate. Then toss all that out and just rate the model and you'll see a big difference in the score you get.
