Next, the QA on a premium car has to me more stringent, simply because the expectations are higher.
So I can't imagine luxury car not taking more time to make than a budget car.
For example, Top Speed suggests that all other manufacturers are still playing catch-up. That it'd be nice if the seats had been updated a bit, but otherwise things are great.
http://www.topspeed.com/cars/tesla/2017-tesla-model-s-ar1729...
A better locksmith takes less time to open a door.
Oh, that and the fact that such cars can easily reach 300 km/h.