Let me interject into this grudge match here.
First of all, this argument doesn't even make sense. Every metalhead on earth felt betrayed when LOAD came out...and has been feeling betrayed by them since. Every album that they release is promoted as "The old Metallica is back"...let's see now...we've been through ReLOAD, Muzak Metallica, St. Anger, etc. etc. Since the release of the black album, we've witnessed the band cutting their hair off (and subsequently being made fun of by Alice In Chains), piercing their nipples, playing Bob Seager Songs, having to watch Kirk Hammitt cry his little eyes out on stage with Santana, being made fun of by South Park because Lars wouldn't shut up about Napster, watching them cry to their therapists about their feelings, forget how to play their instruments, ...and basically just exist purely on their name alone.
What has Iron Maiden done since the time of the Black album? They've done world tours pretty much every other year. They've both lost and found Bruce...and continued to put out top notch material on EVERY album regardless if was Bruce or Blaze. They've release several New Live DVD's of sold out performances all over the world. ...just basically wrote music, toured and kicked ass.
They are, without dispute (see, this is not a point you can rationally argue) the biggest metal band in the entire world and have been since 1982 when Number of the Beast came out. They achieved this with NO radio play, NO selling out, NO compromising their integrity, and a bare minimum of bullshit.