The word for someone who admires American culture?

There does not seem to be an agreed term as you can see from the number of Google references here:


yankophile 945
americanophile 716
americophile 233
americaphile 150
usaphile 14
usphile 1

Contrast this with the situation for lovers of French, English, Chinese or Japanese culture
anglophile 102,000, francophile 84,700, japanophile 20,400, sinophile 3450
Why is this? Snobbery, perhaps - a 'new' culture looked down on by traditional ones? Or is it just linguistically awkward - americaphile really isn't a pretty word.

You might want to check out: 
The New American Century