Those are the rankings as the site has just been added, the reviews rankings are adjusted as users rank the review themselves below the review. Thus reviews are actually community driven and if you feel a ranking should be lower you can deem it so and have your personal review (which influences the over all ranking) below the posts like this:
http://i.imgur.com/tKO1mQ2.jpgThanks, I didn't realise that.
It made me pick a rating for 'support', and I had no idea what to say since I've never had to use it. Allowing commenters to opt out of giving individual ratings would be useful.