I followed a link on seabreeze.com.au to a Naish Catalogue and was looking at the boards. I was very stoked to see that for flex and rocker they are using a parameterised description instead of the usual meaningless explanations like 'soft flex or aggressive rocker'. Instead they use more details parameters to describe it e.g. r8/4/10 meaning from the center to the tip the sections of the boards contribute 8mm then 4mm then 10mm to the overall rocker.
This was one of the original goals of the Board-Off Design tool. Namely, to be able to express all details of a boards shape through a small number of parameters so that if made a change to the board you would then have very precise way of describing the change (via the change to the parameters) and so attribute the change in performance to the change in parameters.
Similarly they are expressing flex with a parameter. In Board Off, I've tended to you a standard 'theoretic' test of 20kg force applied to the tip with the midpoint of the board or the midpoint of the foot strap help in place and the deflection calculated. I don't know what there standard test is ( would be great to know) so might see if they'll share any details....