Most of the time, review scores function as shorthand for the tl;dr set. Scroll through the text to get the quick assessment - better yet, put the score at the top so I don't have to read at all. Besides that, the granularity approaches absurdity as five stars becomes ten points becomes a 'twenty-point scale' becomes comparing a 6.7 with a 6.8 game. What does it mean to be 0.1 points better as a game? The metrics are then propped up with text descriptions that the reviews editors apparently consult when writing a review. Nonsense.
I share Sylvain's desire for meaning, but most reviews are written to inform buying decisions. Is this game worth my $60 or not? Readers build relationships with particular critics (or sites) who share their tastes and tend to trust their scoring decisions. In the age of YouTube and video-oriented gaming sites, the consumer-focused review feels antiquated. Example: I like Giant Bomb. They are striving to push games writing forward, but they are talented entertainers and smart writers. I don't always share their tastes, but they take a very workman-like approach to reviews. They've discussed multiple times in their podcast that their job is to make their audience informed buyers, period. They erect no pretense of criticism. But I find that they've been in the industry for so long that they have a lot of insight about what's good and bad. Further, they feature Quick Looks on the site, which are twenty minutes to an hour of gameplay footage and commentary on new releases. They play a nice range of titles, from Proteus to Super Meat Boy to Call of Duty. For the purposes of buying decisions, I find these videos far more valuable than any written review. I can usually tell within 5 minutes whether I'll enjoy playing a game or not. YouTube Let's Plays serve the same purpose.
Giant Bomb does written reviews too, but I rarely read them. They adhere to a five-star system, no halves or decimals. It's OK, but everything ends up averaging in the 3-4 star range. The problem with scores is that they aim at some kind of objective comparison across time, genre, and tastes. It lets us say x game is better than y game. Sites like Metacritic and Game Rankings exacerbate this problem, allowing us to make quantifiable statements about the 'best game of all time,' divorced from all contexts. How do we accurately compare Mega Man 2 with Assassin's Creed II? Um, scores I guess. It's easier than grappling with what those games did and do, how they've changed, how they work, what they represent, what they teach us about their platforms, and so on.
Polygon is a weird case because they seem to have an identity crisis. They assembled the 'all-stars' of the top videogame sites, hooked into the Verge's impressive CMS, and promised to revolutionize game sites. Their longform features are excellent - thoughtful, well-reported, well-written - but they exist alongside these run of the mill, consumer-centric reviews and vapid news stories that have nothing to do with journalism. I think Polygon missed an opportunity to raise the bar with games criticism. Doing some meaningless review score shift doesn't help (and likely confuses their consumer audience). I also think their site is over-designed and difficult to browse, but that's a matter of personal taste.
The two instances where I find review scores tolerable are a) when they actually mean something - by that I mean a site will actually give a game a zero, average is truly in the middle, and top scores are rare -
or b) the whole score system is subverted as a means to get the reader to
read, discuss, and engage. Action Button does this to great effect. They gave both
God of War II and
Bioshock abysmally low scores compared to the rest of the gaming press (a ZERO for the former) and attracted a lot of conversation due to those scores. As counterpoint, they gave
God Hand a perfect score. It made the reviews engaging b/c I wanted to see how the writers argued their position. And the reviews changed my opinions on the former two games (and made me buy the latter). That's what good criticism does.
Oh, and Action Button will run multiple reviews of the same game by different writers, sometimes years apart, with wildly different scores.
So, the FINAL VERDICT on review scores: 9.8 out of 72.3 game-words-inc. points.