The owner of the Audi did not use launch control on purpose. With LC he does 1/4 mile in 11.8 @ 195 kph (regular road, regular tyres), and a standing mile in 29.6 @ 280 kph. His 100-200 is low 8s, high 7s I believe. This is stage 2 GT-R (R35) and 911 Turbo (997) territory. My average 100-200 is low 9s.
My guess is, the golf would need another 80 to 100 HP to keep up with this R8 to 300+.