High sales do not mean something is a "quality" product. Low sales do not mean it is an "inferior" product. Sales don't matter in judging an individual's opinion. Unless there is a poll conducted by a company or whatever on the general public, it's speculation on part of the person making the claim "No one wants this game/Everyone loves this game."
Otherwise, Avatar is one of the best movies ever made and Twilight is one of the best movies this decade.
And Justin Bieber one of the best artists.
Waiting for: Ni no Kuni - Support this awesome gem. http://www.youtube.com/watch?v=3kUPIPBDA-I