Its a bit strange..
The Manual 6 speed box is running in american with almost 700BHP on huge drag slicks and has almost broken into the 10 second bracket, with the only modification being the clutch
The DSG box is supposedly stronger than the manual box, but the clutch is a lot weaker.. I think thats why there is a torque limit in the DSG software..
Saying that, there is a guy in the states running 420WHP which is getting on for 500BHP with DSG and the stage 2 HPA DSG flash and has no problems, not one flutter..
Personally I think the DSG box is super strong and reliable, there has been a huge amount of scare mongering, but nothing to back it up!