1. Did I say you should take them at their word? [see previous link to the video evidence, plus analysis.]
2. Audi's e-Tron battery has been demonstrated to charge about twice as fast 0..80% as Tesla's 100D and that is a fact regardless of people's feelings. Whether it will create a sufficient perception to translate into marketplace advantage and project profitability remains to be seen. I personally have no feelings or forecasts either way on that.
3. I have not dismissed questions about degradation out of hand: it's simply that there is as yet no corresponding e-Tron data to discuss.
4. We cannot currently know if the Audi battery lifespan will unduly suffer from the fast charging but what I object to is the facile presumption by some here that the e-Tron battery performance is somehow fake or only possible by prematurely "frying" the pack so it won't hold up to warranty. There is no legitimate basis in data for that conclusion...
I understand your stance here, and agree that, until we have some hard data on the Audi, any conclusions must be based on speculation. However, that may be we-informed speculation.
Nonetheless, I appreciate the desire for a data-centric discussion.
...it seems to me to be constructed mainly from a collective shareholder angst that Tesla is possibly being surpassed in a department where it was long considered by them to have an unassailable lead. This e-Tron news appears to have come as a rude shock to them, inducing some colourful spasms of cognitive dissonance across the hind brain.
5. I join you in the anticipation of further and better data.
Here, however, is where you undermine yourself. You are speculating as to the motive of others and concluding that their argument must be based on vested interest. This is behavior similar to what you are arguing against... in implies bias.
On the contrary, there's some pretty compelling argument to be made that the energy -vs- power density differences between the packs (along with the reserve the Audi may have don't allow for the types of increases being claimed while at the same time providing similar cycle life.
So, perhaps Audi has some breakthrough chemistry nobody else seems to be aware of. Possible, but not likely. The other likely tradeoff is cycle life, which given the more "niche" this car may be, likely smaller production volumes, and ostensibly the lesser likelihood that these cars will incur similar miles driven as their Tesla counterparts makes it very resonable that Audi may just be willing to "eat" the packs that need to be replaces under warrantly.
If that indeed is the case that they are sacrificing cycle life for power density, then we aren't comparing apples-for-apples.