I've only had a couple of smart arse comments from people at work "they must be paying you too much", but I'm already used to it as my last car was a BMW.
Can't say I've have too many ricers try and race me, although I have had a few middle aged old blokes in modern day muscle cars (Monaros/GTOs I think you call them in the States) have a go. But it's too hard to speed in inner Sydney, just too many cars.
Have had one person remark that it was a 'poor mans Porsche'

which is funny considering a used 'S' still goes for around $85K Aussie. I just asked them politely what car they drove, the response was they didn't drive anything or have a license for that matter.