Always like to acknowledge other drivers who have had the foresight to buy a Jag. although it does tend to be marque for marque, however, when I had my XF the only other jag driver that acknowledged me was one who had an identical colour/year to mine (Emerald Fire). So perhaps it's an older car thing.
That said, the XF has gone and been swapped for an 2005 XK8 2 weeks ago, and working peculiar hours/shifts as I do haven't really been out much to see if it works with other XK8ers, hoping it does, I kinda like the feeling of camaraderie, we know why we bought our cars and what they can do; Euroboxes they most certainly aren't!!