I went drag racing at Raceway Park last night for the first time with the RS4 and only my second time ever. I ended up running a 13.5 @ 103mph as my best run which was also my first. I was able to get my 60' down to 1.9s for the later runs but I miss shifted into 3rd gear both times and ended up with slower runs. I put 4 gallons of Sunoco GT100 in the car just when the gas light came on and I don't think the car adjusted to it until I was nearly back home.
I think the first run I launched at around 3000-4000 rpm, it all happened so fast I'm not 100% sure. The later runs I launched at around 4500rpm. The car never bogged down but I never got the tires to chirp and just take off like I have on the street with 5500 rpm launches.
I'll have to go back later this year and try to get a good launch and good shifts all in the same run.
Here's a link to a youtube video of my best run.

275/30/19 Bridgestone Potenza RE-01R krazy glue tires
Ferodo DS2500 Club-Race brake pads