Rusty has talked about actual amounts of rocker in his podcasts before. Here is something I found for what its worth..??..
Rocker – measuring and shaping
The term “rocker” describes the curve along the length of a surfboard. Boards with a lot of rocker are designed to give the surfer more control in larger waves, whereas boards with low …abeginnersguidetoboardbuilding.wordpress.com
It would be cool if all shapers started dropping actual measurements / values into their descriptions, but maybe they are being a bit secretive on purpose.
I like to have a very general idea of how the rocker curve is balanced.
If feel like this is something very valuable from a "Will it work for me?" perspective.
No numbers needed.
There is no reason why a shaper would need to keep this secret but most of them never mention it.
Some do. CI and Xanadu come to mind.