This thread has sealed my opinion that gamers give far, far too much significance over numerical scores in game reviews. They are a useful general guide, but the important part of a review is discussing the actual gameplay and such. Furthermore, quality being subjective, different people will give different games different scores. I've sunk dozens and dozens of hours into a game that has a 59% on gamerankings (Victoria for PC).
In short, I feel quibbling over the numerical summary of a game is silly. Arguing vehemently over the internet even more so.