...

I dont know if it helps, but Mark Prator who did the drums is a session drummer for the studio and is REALLY good, so maybe it is one track, I dont know for sure though, id have to give it another listen and see.
 
It is possible to play a buzz roll and still play around the rest of the drum kit.... because as the name implies you are making the "buzz" by forcing the stick into the skin and not allowing it to naturally rebound, so if you practise it enough you can get to the point were one hand will play the buzz, the other will play another drum, then swap, then back again.....

Great drummers like Virgil Donati and Thomas Lang can do this so fluently that it's sickening, and they aren't doing buzz rolls but actual double strokes rolls which are harder because of the higher element of control needed to keep the sticks rebounding only once.

Then again, it is possible that he overdubbed the toms (Mike Portnoy's been known to do this for effect) but it's also possible that he actually played them
 
It is not uncommon at all for drummers to use multiple tracks. As Todd said, Portnoy does it to great effect. Infact. just this morning I was watching the enhanced video making of Transatlantic's Bridge across forever, and he does an awesome drum fill over the top of a previously laid down groove in Stranger in your Soul.

I don't think it is humanly possible to do the stuff that great drummers do with just one track.... Even though Portnoy produces the same thing live.

Oh, and Virgil Donatti :rock: