Since I started paying attention I've seen 3 370z on the road and 1 Nismo in a parking garage. Other than that, nadda. I don't drive around as much as I use to but I still see loads of Mustangs everywhere I go. I'm sure if they made a 4 cylinder 370z with 180 hp we'd see them more often.
Now, G37s/G35s are different. I was on I-10 the other day and saw FIVE rolling somewhat close together. I thought they were a car club or something since the lead car was pretty modded but they spread across the highway and eventually took different exits.