"It's important to remember that rating really has two purposes: to give feedback to the person who uploaded it, and to let other people who come to the site know what they're looking at, based on the average experience of other users. That second role is what I was hoping the rating system would really do for our users--help them sort by rating and rely on the experience of the past average user. "

A lot of categories needs a download and testing time before rating says something usefull for upcoming users.