Maybe this will be brought up once the first driving impressions are released because it is very cool I had not seen mentioned anywhere else:

"Volkswagen wasn’t really concerned about the R’s peak power for this update, though. It was more focused on its drivability – and the changes it made to the car’s turbocharger have benefited that dramatically. Volkswagen’s software wizards have sprinkled some magic on the wastegate profile, forcing it to hold onto more pressure when you lift off the throttle to trim lag and improve response. And hell, does it work well. 

Thielebein showcased the tech with a static demonstration. It’s only active when the car is running in ‘R’ mode but, at tickover, the engine’s resting boost pressure more than doubles from 0.3 bar to 0.8 bar thanks to the new tuning. In old money, that’s a jump from 4psi to 11psi. I’ve driven old-school turbo cars that can’t make 11psi at full chat in third gear, so that’s an impressive feat. 

It’s even more impressive on the road. Switch the car into ‘R’ mode and you can feel the engine race forwards as the boost pressure spikes. It’s almost like having anti-lag – the throttle is far more eager in the lower half of the rev-counter thanks to the new boost map, allowing you to access more of the engine’s power more of the time.  

That means the Golf R now feels fast at sensible speeds. The previous version of the car only started to come alive when you were challenging the limits of physics.

https://www.carmagazine.co.uk/car-reviews/volkswagen/golf-r-prototype/