hardly anything. vast majority see another 3 series. of the comments i do get, 2 out of every 3 are about the LM's.
that's in South FL. i was in Orlando this weekend and i got a ton more comments. so i suppose it depends on where you are. i also got a ton of comments in NC/Tennessee when we ran the Tail of the Dragon, but that's a bunch of petrolheads so i didn't really think that would be the norm everywhere else.