ED cars go through an extra step at the VPC. The ED car has to clear customs for drug checks, etc. Cars arriving direct from the factory do not go through that. Talking to customs people, they say this is at most a two day delay.
The BMW ED people told me my car would be at the dealer no later than eight weeks from date of Europe drop off. That's the timeline BMW tries to adhere to. I suggest doing what I did and that was call the BMW ED rep. They are the only ones who can track an enroute ED car. An ED car is not visible to the dealers computer; so, talking to the CA probably wont get you much info. At least that was what I was told.