In the Olympics premium videos, Ryan talks about how he really likes the dreamcast controller. Which is then followed by Brad comments on how it influenced the 360 controller. Now when u hear Jeff and Ryan talk about sega... they really loved it. Like a lot. Like crazy. SO when they see the 360 and the controller, i can see them subconsciously being drawn in!!
The other features of the system were just plus's for them.
FOLLOW THE MONEY
Btw, this is not a "why dont they use ps3's thread." I just felt that this piece of information can be analyzed by a crack team of Duder's, to explain something or other.