Did I see a Google car?

It had a little black node on top like this: http://thinkprogress.org/climate/2014/12/27/3607036/google-unveils-new-driverless-car-whats-holding-it-back/

But the car looked more like this: http://www.google.com/maps/about/behind-the-scenes/streetview/

It went by too fast for me to see more than a blur on the sides, so I don't know anything about colors or logos.

This was in the northeastern suburbs of Atlanta (Winder). I know they have an office in Atlanta, and I've sent quite a bit of map feedback. Is it possible they're running tests around here?