My girlfriend currently has a 2010 MK6 GTI w/ DSG and I autocrossed it the past couple weekends and actually took first in Stock class with it. Now granted I threw on a set of Dunlop Z1 Star Specs but the car was basically bone stock and hung with the best of them at the autox. It is an incredibly fun car to drive and the torque is everywhere in the powerband. Like others have said the DSG is lightning quick and if you just leave it in "S" it will actuallly hang the revs when you let off so you are consitantly making boost. I found it more fun to drive in S on an autocross than in the Manual DSG mode. The paddle shifts can be cumbersome when you have a ton of wheel movement.
I can't wait for my BRZ I hope the lighter weight will help with similar power delivery even though its got a 50lbft disadvantage. If the BRZ for some reason turns out not as I expected I've already spoken with my gf and I'll be taking over her GTI lease for the next year until its up. Plus you cant argue with 40-50whp from a good tune.