Hola Steve,
Post #1 on this thread gives you a summary on how to properly measure wear on ceramic discs, not just Porsche branded. The pre-2014 discs (or any other that don't have the Proceq markings) are the ones that require a visual inspection, followed by a thickness inspection, then followed by weight inspection. The truck I was looking has the older type of discs, hence unable to use the Proceq tool to accurately measure wear on the discs. Ceramics do lose weight (hence minimum weight stamped on the hub) as well as thickness (also stamped on the hub). Some claim that the thinner they get, the faster they lose mass. You are correct in the fact that there are a lot of people with incorrect information. I've taken the time to deeply investigate on the matter and share with the rest in order to help them a potential financial disaster.
If you take a look at post #52 you will be able to see the wear indicator on the disc near the outside border in front of the second "dimple" of the heat shield. Once you know what you are looking for, it will be clearly visible. The dealership has been somewhat open in admitting they are not subject matter experts, but based on all of the information I've read (factory tech manuals), I am going to trust my own observations and that of people whose business solely depends on dealing with ceramic discs.
I'm enclosing a 100% crop of the same image on post #52 so anyone can see what a wear indicator looks like up close (picture taken by me with my iPhone without zooming a few feet away from the vehicle).
