"The brand also says that drum brakes offer superior performance and reactivity after long periods of disuse"
Sounds like marketing to excuse putting drums on the rear of a $50K vehicle. As soon as I back out of the driveway in our Leaf, because there's no regenerative braking in reverse at 5mph, it knocks the light layer of rust off the discs and we're good to go. I mean, we've been driving this car for eleven years, and not once from a cold start have we gone to hit the brakes outside the regen envelope (say, when we've charged to %100, and nowhere to put that regen energy) and said, "OMG! OMG! Poor brake performance!"
What VW really said in that link was, "doesn't need rear discs: regen braking".