Been lurking for weeks, decided to toss an opinion...
The dual unit test in the pic is completely invalid.
There fixture design has no chance of equal loading of the parts,
and due to the designs of the units as soon as the force went up
one was bound to compress just slightly more than the other and
from then on its failure city.
If they had used a symetric fixture and done one at a time on a
Saytac stress machine I'd give it way more credibility.
I worked in a testing lab for a time on this type of mechanical failure
and they have way over simplified the problem. The fact is GC makes
a good product, and the Vorshlag plates I've installed looked more than
adequate to do the job.
In 15 years of racing everything with a motor camber plate failure has
not been a prime issue for me...

Dave