I wouldn't know Foo Fighter's prime from any other time. They've always been insipidly vanilla and predictably forced with every song I've heard. I actually really dislike the Foo Fighters, can you tell?
What's funny, though, is I bet I'd really like an acoustic album from them. I see their approach as very needlessly loud. It's silly what Grohl decides to scream about and it comes off as gratuitous. Nirvana in a rout if you ask me.