Indeed, but in SD you can easily customize a map to reflect the MIDI if need be. You can get some interesting results by intentionally mismapping something (i.e. turn a ride cymbal bow into a floor tom to change the feel of a beat).
I used to use Twiddly Bits, but have gotten more from Loop Loft recently. These days, being a drummer, I don't bother with purchasing MIDI very frequently. I usually just perform or program what I need myself.
Here's some stuff that I triggered live from SD2.0 using a Roland TD-25KV:
(6-song playlist)
Here's some stuff that was live triggered by another drummer on an Alesis kit (Alesis I/O acting as the brain) and then cleaned-up and supplementally programmed by me using SD2.0.
All of those examples use the stock SD2.0 Avatar kit.