I had a look today at the DCSnet system and checked the parts catalog for the 2013 F30. Showed it was last updated during November, 2012 and the Nav system does not show a revised part #. I used the VIN assigned to my PW45 car (in transit) and it showed the same Nav part# as older F30's.
So, I think this likely gives closure to the Nav upgrade question for US F30's.