Q. You keep using the term "progressive," and I take it "prog" is the short form. What does that even mean?
A. Heh. Oh the wars that used to erupt over that question on message boards and email lists in the late '90s. There's no one definition, but as any true prog fan will say, only mine is correct. Key characteristics include experimentation, extended instrumental passages, bonus points for grand themes, long-form compositions, and a focus on superior musicianship. But if you ask me (and, O hypothetical questioner, you just did), the - THE defining component of prog is odd time signatures. Is Tool prog? Oh, hell yeah. Rush? Yes? King Crimson? Yes, yes, duh. Dream Theater, Symphony X - you get the point. Pink Floyd? Well, that's a closer call. But since "Money" is in 7/4 time, and they've got the other ingredients, okay. Then how about grunge? Lots of grunge tunes in odd times - think Them Bones, Spoonman, Outshined, Fell On Black Days - does that count? No. Just 'cause something's in 7, that doesn't make it prog. That's my story and I'm sticking to it.