I think most of core gamers would agree reviews are pretty accurate. Especially when you uses sites as gamerankings.com as a some kind of guide. I can't afford to buy any game I'm interestet in (teasers, hype etc.) so I really appreciate this particular site. For example I think 9.0 (IGN) for Killzone Liberation is a bit too high but with many rankings marged you get ~8,0 and as for me it's pretty accurate. Also they provide users voting. There is a problem with casual gamers because they normally expect something different than core gamers who obviously makes reviews (there are still people who buys this crappy Wii-play). IMO you don't need to play 30h to provide a reliable score. I would say really narrow category of games needs closer look to find this hidden appeal (mostly logical games, puzzle etc. ).
