I know that, of course... now they have been added to the Rumble Frequencies wiki page ...
My thought was, assuming 10 2 2 10 is flat within the preamp, what difference would the cab make. Would the 12 dampen more of this frequency and the 10 of that,... you get the point. But I think you are right that that would be rather difficult to
achieve because there are so much more factors that influence sound.
I like to set my amp without looking at the knobs anyway. I think it distracts more than it helps in many situations.

