Sure, the real challenge must lie in quickly recognizing the different test setups for consumption vs pollution, because they certainly "require" very different

Sure, the real challenge must lie in quickly recognizing the different test setups for consumption vs pollution, because they certainly "require" very different engine parameters. I would not be surprised if (or rather: I'd be surprised if not) consulting industry experts managed to sneak some easily detectable patterns into the initial part of the standardized "test scripts". It's not like these kinds of optimizations are in any way brand exclusive, or it was impossible to know of them before these news (the only way to not know about them, assuming a moderate interest in all thing car related, was deliberately turning a blind eye for the sake of believing in progress)