Very interesting combination, double silver, with black as well, and Sang Noir wheels. Don't think I've seen this one yet. I've got almost every U.S Veyron in a catalog, could this be a modification of an existing chassis?
Edit, found more pictures from the cruise, it's a kit car. Google 2013 Woodward Bugatti and the front is quite far off from real.
The U.S is at roughly 80 Veyrons, give or take +/- 1 or 2 cars for overseas trips, and press cars coming and going. Not counting the possibly new Vitesse that entered the country about 2 weeks ago.