Up until recently all I've used is light action rods. I bought an ultralight rod (Fenwick Elite Tech River Runner) last year and it doesn't cast 1/64 oz. jigs any farther than my light action rods with 2 lb. test. It is more forgiving in the fight and so I don't have to be quite as careful fighting the fish, but I don't notice any significant distance in casting. Can't speak in general or specific to the Shakesphere rod question you've asked though.