most of the bands engage their producer to portray the way they wanna sound. unless to be influenced with society as new times kick in to cater to the young modern audience and their tinnitus problems (a.k.a one volume. loud.), if it's to sacrifice a small narrow audience who just wants them to "stay the way they are" , they'd do it. I loved how greenday used to sound in 1039SOSH/Kerplunk, then changed their stuff more modern/polished with dookie/insomniac, then eventually evolved to nimrod/warning etc till now. they're getting older, but would still attract new young fans because of the way it's marketed and the way it was recorded/mixed/mastered/produced.
wouldn't you like your band's tracks done sounding (or at least semi-)professional and have a chance to get radioplayed by mediacorpse without being skipped within first 30 seconds by 1st-time-listening-consumer? maybe not if your morals told you to stay "true to yourself". though in my opinion, music is wasted if you didn't write for others to hear.
would you still listen to after the sky if they asked their producer to give them a polished sound? if not, were you just a fan of the sound or fan of the songs? hehe.
to answer your question, it sounds like alot of room mike work. and no drumreplacements. to achieve that mix is to under-mix lesser than the polished stuff you hear these days. it's not "Raw" it's still mixed but it's not polished thats why it sounds raw in a good way. if that makes any sense.
