i went to Turbo Tune on south road, they have a 4wd dyno set up. umm, i think the cost was round $60-$70 for a power run and print out of it, i had a service as well that day.
i rekon they got up to a 50/50 split, the tourqe guage goes up there, but im not 100% sure! i thought they had the same attessa-ets system as the gts-4