One thing to add--if you're talking sh*t about your GTi, I really don't think you deserve to be driving one at all, or even be on this forum.
I haven't seen one person talk shit about the GTI that owns one here. I have seen people (notably, the engineers) be realistic about the car. It's a GREAT car, and balances straight line performance, handling, practicality, economy, and cost better than pretty much any other car out there - but it's not the fastest car on the road by a LARGE margin. Stick that mustang ecoboost v6 in a GTI and I'd be in heaven though - the '11 mustang is an amazing car for the money.