They were too liberal with jazz/hip-hop/classic rock, just liberal enough with electronic, and not remotely liberal at all with ''indie''/metal/modern avant-garde. But it's just an arbitrary number, a lot of the things that SHOULD have gotten 5 stars got 4.5 and a glowing review. In 20 years we'll see what earns their way to 5 stars. Zep probably wouldn't have gotten all those 5s if they weren't so old, I've read so many lukewarm 70s reviews of them.