You seem to be as confused as me.
After reading the patent and about the "J Damper", it can be said that Mclaren's J damper is not a damper. The word damper was used to mislead.
And most of the F1 fans have been mislead, so you cannot be blamed for that.
Mclaren's J damper was more than likely a fly wheel based inerter, rotating mass.
Renaults 2006 system was more than likely a rotating mass inerter and not a tuned vibration absorber correct?
So in essence both teams were using inerters and not vibration absorbers am i right?
There is no different between the device for the 2 teams then.
I think everyone is lost as i was at the beginning of the discussion. I now realize what both concepts are and i think we should all adjust our perceptions.
I am assuming neither team have used a vibration absorber. They both have used inerters.
When i get the energy i'll do a simple example of a vibration absorber and what its purpose is. Then i'll try the inerter using a flywheel type example, as i'm not too familar with it yet. I hope i can do this!
Lazyiness i tell you.