There is a lot of howling by owners of other marques about these R drag races.
Lots of "VW must be cheating"
I am fairly sure that drag race performance is not just a (quoted) power to weight ratio issue.
Its going to be something to do with the powerband and the shift points on the automatic gearboxes. I doubt very much when in "sport mode" that most cars are shifting up at the absolute optimum point, but instead shifting up at the redline (because it looks good on the dials).
I suspect VW could well be "gaming" this, but not for dumb tests like this, but actually have set the car up to actually perform optimally for road use...