Replying to What's up with K2 radius specs?

I'm used to seeing sidecut radius listed as meters of turning radius for a certain ski length, like 18.5m radius for a 176cm ski. But K2 lists sidecut in millimeters, which I assume is not the turning radius at all but how much of the ski is cut away at the waist. How am I supposed to compare that to the industry standard sidecut radius specs? Do they expect me to dust off my old calculus books and do the calculation myself or something?