If they keep this pace, they'll have more songs in Rock Band than the Foo Fighters do by the end of the year, and that's no small task.
They stand as the perfect argument to one of the most common Rock Band complaints. "It's been years and Band X isn't in the game yet! Harmonix [expletive deleted]s."
Amberian Dawn proves this isn't the case. Band X could have two dozen songs playable in about a year and a half if they wanted.
If the songs aren't in the game, then it's Band X that "[expletive deleted]s" for not wanting to be there, and the band's FANS that "[expletive deleted]" for not convincing them otherwise.