I agree with Nekrobot. I remember years ago when i heard their law for the first time - i wanted to riot! It set the tone perfectly for the album. Then when they appeared on 'board stupid' before FOTL was released, they played Firestarter as a taster of what the album would sound like. The hairs on my neck literally stood up. I think they're doing the same thing here. IMD is the album opener just like SMBU was. It will all make sense.

And anyway, if its not to your taste and the album is strong as everyone says it is ...everything will be cool.