Don't live or work by the Factory or SvCs but I can typically see anywhere from 1-4 MS a day when out and about. Yesterday saw two black, one white and one blue. Reds for some reason are hard to come by here. I've only seen the titanium brown one while at a SvC or SC. So far no other colors. One day I didn't see any Teslas at all, noted it mentally and kind of felt like something was missing .
It's really called titanium silver, I think (not to be confused with the "real" metallic silver). Consider yourself lucky if you see a real brown or green...those haven't been made for awhile.
Bruce.