From Ross Halfin's blog (Nov 19) :
Tenacious D [...] Fuck, I hate them. I mean, two actors pretending to be rock icons.
That's the kind of silly statement you'd make if
1) you'd never seen Tenacious D play, and
2) you'd never seen Kyle Gass act.
Surely the D are one actor and one "featured extra" pretending to be two losers who think they're destined to become rock icons.
I hope Ross paid more attention to detail in the Iron Maiden book. I'm assuming it's a book he wrote a couple of decades ago when the subject was still relevant.