E.H. Harms informed me by email several weeks ago that my A8 would arrive at the Wilmington DE port on 2/20. I recieved a number of documents related to US certification (EPA) from Harms the following day. About a week later my dealer informed me that the car was "in transit" to the dealership. I'm not sure why it took another week to travel the 90 miles from Wilmington to Harrisburg, PA but the car arrived yesterday afternoon and I'm picking up the car on Friday afternoon!
So, from drop off to dealer arrivel was exactly 6 weeks. I'll post some pictures when I get it home.