All this proves is that GTA IV is the best game ever.
Seriously, though, these phantom reviews are so ridiculous. Who gave OoT a 10/10 a month ago? It seems like you can just start a website and slap reviews on there and get gamerankings. I thought they were better because metacritic weights certain reviews more heavily and doesn't tell you how, but it seems they are both a little sketchy.
Oh well, review aggregates are just useful guidelines anyway. You can easily look at the reviews you trust more so it's stll quite useful.