While I agree that they're not terribly encyclopedic, I don't know if we should use the Academy for their categorical skills, considering the first Grammy for Best Hard Rock/Metal Performance was awarded to Jethro Tull, who beat out Metallica.

Disclaimers: I love Jethro Tull, and love Dio, refuse to give Metallica any money, and am a nearly full-spectrum metalhead.

huh?

https://www.metal-archives.com/albums/Dio/The_Last_in_Line/1...

The award was for Tenacious D's cover of the song, which isn't in the encyclopedia.