Tim Waterson is sick, 1400 BPM, but I think Death Metal and Metal in general is not about 1400 BPM doublebass or stuff like that.
Death Metal in my opinion is about accoustic brutality, I've heard Bill vom Decrepit Birth saying something like "when I first heard Suffocation I felt like I should kill somebody", I think this is a feeling you should get while listening to really good Death Metal (but please, don't walk around killing people while listening to some Death Metal
).
Inferno is the perfect match for Behemoths music, he is tight and fast (enough) and plays the stuff like it should be played, I don't know if he would match our music (I sing in a Death Metal Band and play the guitar in an other Death Metal Band) but like I said, for Behemoth, perfect match.
So now about Death Metal Drummers, there are many very fast guys, Reno Killerich (ex-Vile, ex-Dimmu Borgir, ex-Panzerchrist, Black Dahlia Murder, live drummer for Hate Eternal ....) Derek Roddy (but he's able to play some cool other stuff, many Death Metal Drummers are only Death Metal Drummers, but Derek, listen to his Jazz stuff) Flo Mounier (the same like Derek, great Jazz Drummer) KC Howard (Decrepit Birth, Odious Mortem) Mike Smith (Suffocation) and so on.
All these guys match their band almost perfect and you can't change the Drummer without hearing the difference, Mike Smith in Behemoth..hm would be cool but wouldn't sound like normal Behemoth.
So, ok, I am bit drunken
and I hope everyone is able to understand what I wrote.