If you think about it, the whole break-in stuff doesn't make a lot of sense anyway. BMW could very easily prevent the engine/DCT from reaching revs >5500 rpm. As you probably know, the car won't perform manual downshifts if the engine would end up >7250 rpm anyway, so why not lower that limit to 5500 while still <1200 miles?
I'm with BigHat - you could most likely leave the dealership using launch control without any issues whatsoever