I hate that crap. I had a guy tell me I had a 427 (thinking it was the old shelby cobra even though he was looking at it), and there's been people insisting my car's supercharged, and the ole' 4.6 comments as well. Too funny.
my buddies and i call it "small pee-pee syndrome," hehehe. of course, we're referring to the guys w/ huge lifted trucks and completely whacked-out/tricked out rides.