ok, i wrote this from an armchair, and its probably closer to $1 rather than 2c because its kinda long...... But this is what i see about the whole flexi-wing thing.
Here are the typical stress-strain graphs for 1.) ductile and 2.) brittle materials. Carbon fibre is brittle; which means its strong, but will deform very little before it breaks. They can align the fibers in a different direction or even use other materials (blend) to make it more like 1 (ductile); but either way, the end material is going to have ONE behavior/graph only.
All structural materials have a range in which they will deform and then return to its original shape once the load is removed. This is the 'linear' range, which is the only thing the FIA care about because they know it is the key design range. Whatever the material they use, is likely to be used within its linear range... simply because nobody wants permanent deformation, nor being so close to failure. The maximum flex the fia imposes is basically to 'lure' the teams into stronger brittle materials (closer to 2) rather than spandex or something.
But i'll repeat: the end material is going to exhibit ONE behaviour only, no matter how close to which (1 or 2) the resulting material is. It is VERY unlikely that Red Bull have found a physics defying material that will show its 'linear trend' under the fia's test range, and then do something completely different on the road.
To me, it is MUCH MUCH MUCH more likely Red Bull have a mechanism (outside of the test's scope) which modifies the way the wing behaves, rather than re-invent material physics.
This mechanism doesnt keep the wing element from behaving OUTSIDE the regs during operation (note i said behaving, not flexing), and i think the FIA are deliberately turning their backs on the issue, because frankly... its good for the sport.

You do not have the required permissions to view the files attached to this post.
Came out fighting indeed.