:::Have to disagree with you there.  I personally don't hear much syncopation in their music.  I can think of some examples where it is syncopated but not overly.  The rest of the characteristics you mentioned are typical of most (if not all) heavy metal bands... especially the downtuned guitars.  Most bands these days downtune, metal or not P  Text book nu metal: Korn, Limp Bizkit, Slipknot.