They have an address in America - nowhere on their site could I find that they are an American Company. Are they a registered American Company? or are they a company from China who have an office and distribution network in America.
If it's not proven they are an American Company then I don't think these threads should be moved to the USA section.
Interesting (I couldn't think of another polite word for it) that they called themselves Dale Tiffany and now have a line of glass called Favrile.