It sounds like there's no guarantee of getting the 330D, they may save the 3.0 for the bigger vehicles and go with the 320D in the US to focus on the fuel efficiency.
F31 320D would be a pretty nice all around daily that's for sure. Torque FTW.
Current: '15 M235i Vert
Previous: '13 335i, '08 TL-S, '00 Corvette