How did you find know the US market won't be receiving the 8" nav screen. I will sorely disappointed if that is the case because that is one of the reasons I am holding out for the Mk7.
Sorry to relay the bad news, Booger. I'm sure you'll be as disappointed as I was to hear this.
http://www.caranddriver.com/comparisons/2015-volkswagen-gti-page-3
As in the new Golf, the center stack—complete with massive eight-inch multifunction screen—is canted slightly toward the driver. In the interest of cost cutting, though, our GTIs will have a smaller nav screen.