"Man, this is nice," my driving partner says, as if a little surprised. We're just seated inside the 2016 Lexus GS F, awash in colorful leathers, soft Alcantara, and crisp digital displays. While I'm trying to figure out how far we are from the Cicuito de Jarama track, our destination for the day, 8:30a.m. traffic engulfs Madrid on the roads …