I saw 5 XF's yesterday not including mine:

Aero Blue Roadster: Where I work near Quantico
Black Roadster: in a gov't lot off of S. Courthouse Rd in Arlington
Red Roadster: In Springfield on 7100, got a wave from the driver
Aero Blue Roadster: On Minneville Rd in Woodbridge, got a beep and a wave
Red Coup: in lot For sale near Fredericksburg