At my only track day last year, I was approached by the uncle of one my fellow drivers.
He had this comment: "Your car was SO much faster in that session than it was before. How was that?" He had mistaken my car for an instructor's silver Prius driven in the session preceding mine.
I had to laugh.
True stealth.
In the nearly two years that I've owned the car, it has accumulated only 2400 miles. It'll get more miles this year driving to a few events and doing track days. i rarely actually encounter other people on the street when I am in/with this car. One guy did call out to me from his balcony in downtown Redmond and asked me if it was a Subaru when I was stopped there to go for a run.
And it's all good to me.
I prefer stealthy cars, despite my prior track car's over-the-top mods. My daily driver is an Audi A4 wagon with a high-output, small-bore V8 engine, renamed an S4. It is very stealthy as well. I seriously (though briefly) contemplated putting down a deposit for a Focus RS, but really my old wagon and my Fiesta do everything I need. The wagon does have 54,000 on it, but no matter what it'll cost me less to keep that running than to jump to the new monster. And the little FiST is plenty of fun for this old fart at the track.