For the person that mentioned plant shutdown, I just finished a Performance Center Delivery with my mom for her X3 (I got one in July), and the plant has shut down for the holidays, however they told us that they weren't putting anything new into production, but they were finishing anything already on the line. Hopefully it will be quick, and could be why the completion dates for some have been moved up.
To the person getting carbon black - excellent choice! I personally couldn't be happier with it and you will feel the same.
On another not, the Performance Center Delivery was amazing! If anyone has the chance to ever go, I'd suggest it. Riding along for a Hot Lap was incredible, and everything else that I got do myself certainly made me put myself out there in a way that I never thought I would behind the wheel. But definitely worth it to experience it and see the way things work, as well as teach me a few new things.