Interesting. Wikipedia says "[The Panamera] will be marketed as a direct competitor to automobiles such as the Mercedes-Benz CLS63 AMG, Aston Martin Rapide, Lamborghini Estoque and Maserati Quattroporte and (to a lesser degree) a less expensive alternative to vehicles such as the Bentley Continental GT and Ferrari 612 Scaglietti. "
Seems to me he BMW M6 offers better performance (or at least the same performance as the Panamera Turbo S or something) and has much better looks: