VGPolyglot said:
How many games have they given 10/10 this year?

This is key, tells you whether they're just generally generous scorers or whether they think the game is truly exceptional. 

Doesn't look like anyone answered the question in the thread, so I went and found out for myself:

2017:
Total reviews - 286 (a substantial minority are for small retro digital titles though)
10/10s - 8 (Zelda Switch, Zelda WiiU, MK8 Deluxe, Splatoon 2, Metroid: Samus Returns, Axiom Verge, Super Mario Odyssey, Pokemon Ultra)
9/10s - 44