Beyond a ballpark estimate, probably not. However, the actual number is only half the story - the discussion that goes with it is arguably more important than the number itself for the design event. Chassis judges ranking teams on the number they quote as torsional rigidity without other considerations is as bad as engine judges ranking teams based on peak hp and nothing else. If that's what's happening, the accuracy of the quoted number isn't the biggest problem. Wouldn't suprise me, we were informed in the design event that the chassis and suspension are actually the same thing. To think, we've had it wrong all these years...

As for us, thanks to the technology and materials we use, we can make all sorts of stiffness compromises to help other systems and have it still come out rediculously stiff. This doesn't in any way detract from how important a stiff chassis is to damper performance, as you say...