Actuuuualy, Hz chassis rigidity talk was taken quite seriously in VW/Audi forums of yesteryear, even BMW forums that I was involved in a few years back.
German car owners (like myself), took their chassis rigidity numbers very seriously lol
If you want some food for thought, and also how old this topic really is in the modern car day world, read about the VW Pheatons Flag Pole Test.
This goes to show how far behind Made_In_USA cars really were, but finally caught up circa 2010.