I agree that the drummer is great, but it is the orchestration of hte drums that annoys me...Sure, the guy is fuckin fast and fuckin good at what he does, but i don't think it fits sometimes -- like the fast snare+cymbol he uses. At times, it sounds too much like grindcore or thrash, and it doesn't seem to fit the rest of the music they are playing. Let me look for an example...ok, I pulled up Cast Down the Heretic, and a good example of what i am talking about starts around 00:30 point. I think they could have coordinated that better.
And if you can't see why I can say this, you need to realize people have differing opinions. I am a fan of Nile, and i have most of their albums, but the drums in some certain parts annoy me.