If brompton really wanted to increase it's presence here in the states they would make it possible to get a bike in less then 3 months. Bike Friday typically takes around a month to get a custom made bike to its customers and only about a week if the bike is a stock model. American's are not patient :-)
**Disclaimer I own 2 bromptons, en M3 and M6 and 2 Bike Fridays a tikit and a pocket rocket...