While Mercedes-Benz, BMW and Audi have been throwing jabs at each other recently in commercials and billboards boasting how sporty their luxury sedans are, Lexus has snuck right into the mix with its all-new 2013 Lexus GS. The fourth generation of the Lexus GS was introduced last year at the Pebble Beach Concours D'Elegance, and in a fitting fashion, this new car manages to blend an impressive level of elegance, luxury and sportiness. As a promising sign that Lexus is finally able to knock its German rivals off their pedestals, Lexus invited us out to the Las Vegas Motor Speedway to spend a day driving several different variants of the new 2013 GS.