Poster #20, I'm not sure you got the distinction. One claim is that faster "reflex speed" is due to lower weight primarily. Another claim is that is is properties of the carbon fiber itself that causes the faster reflex.
Under the first clam (which is what I believe in): if you build one mast in 100% carbon fiber and another one with identical weight and stiffness using less carbon and more glass, they will have virtually the same reflex speed (and if you compare say a 55% standard diameter freeride mast with a 100% rdm wave mast you in could in practice come out with rather similar stiffness and weight data).
People that believe in the second claim will think that the 100% carbon mast will have a faster flex response in this case.