Pitchfork consistently downgrades certain genres of music, notably prog, progcore, and avant, and consistently overgrades other genres of music, specifically stuff like Interpol. Because their rating system is based on indie sensibility rather than on the belief that one should assess each album by the standards set for that genre, this makes them a bunch of pretentious assholes.
Additionally, many of their reviews focus on individual songs (one tight song does not make a classic album) and ignore things like album coherence. There is no way, for example, that TV on the Radio's Desperate Youth and Bloodthirsty Babes deserves the rating it received...the album lacked any semblance of coherence, and while some of the songs were really catchy, much of the album was totally unlistenable even for a fan of the genre it attempted to belong to. Finally, the majority of any Pitchfork review is discussing things besides the particular album, and is either comparing a release to other work by that artist, or is an avenue for the author to dangle his big indie dick and talk about things that have really no relevance to the album being reviewed.
And really, why should anyone offer to review for them? I mean, Pitchfork should not be the deciding factor for whether or not an album is well-received by the scene. I don't want to be told that Floss by the Descending Testicles is a classic album by someone who spends the whole review talking about the Canadian indie scene and maybe a paragraph talking about the one single on the album. I don't want to be told that Arcade Fire's Funeral is amazing, I want to listen to it and decide for myself.
The idea that a single review website that doesn't review seriously but rather reviews in such a way to promote specific types of music determines whether or not a large subculture will or will not listen to a particular CD or band is absolutely disgusting to me, especially because this subculture prides itself on being individual.