I see similar things here getting on and off I-17. VW does a lot of street testing here along with a few other car makes. Here they're usually black with some grey or white type primer panels/spots and no make or model insignias. Overall shapes are so similar now, it really is hard to tell what they are. The one that was definitely recognizable was the new beetle before that came out. Paint or wrap that however you want, there's no mistaking it. Plus, there's usually at least 2 or 3 playing follow the leader.
"The individual has always had to struggle to keep from being overwhelmed by the tribe" - Friedrich Nietzsche