A review that has all the way through it - "I don't like adventure games". And "nobody who reads our mag has kids, so if it's not for adults "mark it down!""
What a point and click adventure would have to be nowadays to break the 70% mark only God knows.
On the other hand the most bland, obvious, poor storyline and AI FPS game will always never go below 70% to make sure the genre is seen as No.1. with no other genre beating it - especially point and click adventures.