None of the quotes there deny changing anything for a more flexible front wing, though. I think it's quite clear they did, and they will of course never admit it, as no team would. Notice how much emphasis he keeps putting on 'interpretation of the rules' and whatnot and saying the FIA are happy with the car. They know what they're doing, and are just playing the game like everybody else.
Going from the misery of Austria to the domination of Austin was not merely just setup differences as he's cheekily suggesting.