I have heard the newer ones to be pretty fast. MY buddy has an 08 wrx with cobb access port and a cat-back and he got pulled by a stage 2 mkv. I dont think they are that slow but im assuming the turbo you have is from an sti? you should be able to hold your own, but let us know when you actually race
Alright, you should win no issues.... I'll explain....
Thats my buddys MKV GTI. He has the DSG which basically gives him a length every time I shift. He is APR stage 2++, he has the Carbino CF CAI, APR downpipe, APR fuel pump, and the APR tune to back it all up. This sucker moves!
I only have a Cobb Stage 2 tune on a 02 with 100k miles. I have a 3in invidia DP with straight flow 4in electric cutout midpipe, K&N drop in and snorkus delete, and I run 33% E85. From a stop its no contest, he spins even on nice Eagle F1's. From a roll he gets a quick jump (there torque is very nice), but in the top end I reel him in and pass him. But then I shift and that sick DSG brings him back side by side with me. So essentually we are dead even.
So that GTI is a good step above your co-workers, that plus im on the stock tiny turbo. So you should have no issues at all.