I think most GTIs are still in fleet ownership, and the owner doesn't really care about the scene too much. In a few years things will be different.
I'm more discreet and give GTI drivers a nod, most smile or wave back. I found that waving first made people think I was some kind of nutter!
Around my way, Tornado Red VWs are cop magnets so I have to drive it sensibly. I used to get it in my Polo GT and Corrado G60 and I thought it was because I was in my late teens. A few years have passed and all was well until I got a red GTI and I've noticed cops following me much more. I never had a problem in my dark SEATs!