Have to say that the new grey appears to be way "cooler" than the old one. One of my fellow Model S's at work is the current grey; the owner typically plugs it in alongside mine almost everyday at the two HPWCs there. The grey looks increasingly dull and tepid the more I see it, particularly when mated with the standard 19" wheels. The grey ("titanium"?) on one of the LEAFs nearby looks far nicer.
Also, for a car of the Model S's proportions, lighter colors do not necessarily work in my opinion. There's a reason for the dark shades; they look classy, elegant and timeless for such a big car. My wife's cousin in San Jose - who waited a few months for the MC Red - wishes he got one of the darker colors each time he sees my green; he considers his own bright MC Red to be a bit tacky-looking after a year of ownership.