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...
2011 Space Grey E90 M3, DCT, Comp. Pkg.
1997 Z3 2.8, Artic Silver, Tanin Red interior, MT
1974 2002tii, Inka, 5 sp manual