I've had my WRX wagon 3 weeks and had no comments. I've not even seen another Hawk Eye wagon in the area yet. I've had a few cars try and beat me, which I ignored all barr one of. The one I beat I think was suprised when he saw the back end and realised I didn't have the "rear" end that they expected to see!
I never had this when I was driving my GT4 WRC, however most people that weren't into Rally or Jap, had no idea what it was. The young lad in Halfords "RipSpeed" once said I like your Supra.....