That could certainly be one interpretation. Being a bit on the cynical side I assumed the offer was an attempt to move primarily current inventory and therefore meant delivery from the dealer. While I don't dispute your view as very possible, my cynical nature tells me BMW views your delivery at the Welt as the actual delivery, not the re-delivery back in the states. But that's just my opinion! As I noted very early in the thread, a simple call to USAA by the OP would answer all of these questions...
Current: 2011 Space Grey E90 M3, DCT, Comp. Pkg., Conv. Pkg., everything but Cold Weather Pkg!
Gone: 2008 550, Space Grey, Sports Package, Sport Auto Transmission.
Sold: 2004 545i (U.S.), Steptronic, Silver Gray.