I'm actually quite surprised if there are Americans who aren't familiar with at least the theme. Each year, it's gotta be used at least once in a new commercial and has been covered tons of times. In recent films, it's been in "Bewitched", "How to Lose a Guy in 10 Days", and the remake of "The Parent Trap" in some form. There is actually a Japanese version by Nat King Cole. I'd say most of Cole's songs are considered standards.