BigMike - That's it. It's category dependent.
Chad - The lowest rating gives you a (weak) feel if the product is a dud. You just have to temper that with the facts -
1) Some product will always slip past QC
2) Some people have no idea how to correctly use the product
3) Some people are having a bad day and taking it out on their expensive purchase
So in a lot of ways, yeah pretty useless, but I still get a kick out of reading them
And I think NewEgg is the cat's meow. (meaning great).