I guess I have to say I am glad I have the option of clicking on the AT. Most of the time I don't see them make more than a .2 - .3 change in N1 values so I can't say I would think that turning them off would save any fuel. I actually land with them on most of the time. I know some guys that think it is easier to turn them off, as they flew the CRJ before....but having as much T-prop time as I have I still find them very helpful. Of course even with them off we still have the fadec to help if you want to just set them in the detent