I do known that some 'brand name' IMAC / pattern guys rely a lot on different rates / modes for different figures - switching even during a figure in some cases. Real examples, from this year's Advanced: - higher rate rudder for a stall turn, then immediately to lower rate for down-line snaps; or higher rate elevator entering a spin, to lower rate elevator at the break (the break being done with a rate change switch).
While it makes sense to me, I tried it for a while, but I always managed to have the wrong rate at the wrong time - downline snap with large rudder throw results is scary snaps (to me at least, since I tend to fly at the low end of speed ranges) - so I 'settled' (for this weekend's contest at least

) on a single rate for everything. I will, as a result, have a bit less rudder and aileron than 'ideal' for some figures, and a bit more for others - yes, the old thumbs should be able to handle this, but ...
Cheers,
Bob
(heading to Wenatchee in a few hours - oh boy!)