The Rev and Cargogirl have got it right, I think. It's due to the shape of the wing. It also doesn't have a stall warning system - no bells, whistles, lights or stick shaker. It's been awhile, but I seem to recall that it took a lot of muscle to horse the airplane into a stall unless you had a lot of nose up-trim, and there was a clear pre-stall buffet. At the break the pitch down and roll was impressive though.
Interesting note, on skis the airplane is very nose heavy, so much so that we used to use the rear tanks as the mains. The skis weigh around 1100 pounds total, and empty the c of g is at or very near the forward limit on the pure freighter version.
Cargogirl, does Folsom's still have that one on floats?
