I have mixed feelings....
It seems like there is so much that affects game ratings/reviews other than the games themselves that it has become impossible to place much stock in them anymore:
1. Advertising money. It is impossible for me to believe that a reviewer, writing for a web publication that relies heavily on ad funding, does not think about the financial consequences of a bad review. The reality is that if you slam somebody's product, they will be less likely to a) give you money and b) give you access to developers, etc. for all of those "preview" articles. There are many review sites out there and if the ad money follows good reviews, a race to the bottom is inevitable.
2. Fanboys. Drink the Kool-aid and give good reviews, no matter how the game plays.
3. Ratings inflation. This is a tricky one for me. We're now in an environment where the younger gamers expect that a game worth playing should have a 10/10 score - and fanboys expect no less or they raise hell. It seems like it is impossible to use the full range of a 0-10 scale these days - the expectations of the community are so high. Shoudn't the worst game of the year get a 0? Shouldn't there only be maybe one game a year to get a 10? I dunno.
It gets more complicated for me though. Back in the day, the print edition of PC Gamer used to dole out some savage reviews to PC games. Many of those ratings were appropriate, but the magazine's standards were demanding and some good, fun games were given surprisingly low scores. In the late 90's this mag had some clout and a poor (or late... but that's another story) review could definitely affect sales. At around the same time, the console mags were just industry fluffers - published by Sony or Nintendo and they raved about everything (natch). A real console stinker might garner a 7.5/10. So, on one hand, the console "review" mags were obviously non-objective but they were successful in generating considerable excitement for their platforms. On the other hand, I felt that PC Gamer, while more objective and demanding of innovation, kinda hurt the PC platform. Do I think that they should have tuned their ratings to meet with the rapid ratings-inflation that was occurring? No. Yes. I dunno.
Mixed feelings.