Rules - if an engineer with today's tools put his chops to it, the differences could probably be verified. It takes a lot of doing and my experience is that measurements only verify what we already learn through listening. I suspect the Klippel analysis system could show some relevant information. I don't know who might be working at such a fine level of analysis.
For the record, what Thiel would do is discern the improvement by ear, then subject the change to objective measurement. If anything could be determined to be harmed then it's "back to work". If no objective change could be measured, then it's down to cost / benefit discussion among the team.
For the record, what Thiel would do is discern the improvement by ear, then subject the change to objective measurement. If anything could be determined to be harmed then it's "back to work". If no objective change could be measured, then it's down to cost / benefit discussion among the team.