Nice looking spec there B33M3R
Like you I'm waiting for mine after signing on the dotted line the other week.
I've had contrasting stitching in a couple of cars (Audi's) and I wouldn't spec it again, especially light stitching on dark leather. I am very careful in the car and have OCD about cleaning it etc, but even I struggled to keep the stitching looking fresh and sharpe - just my 2p.
Interesting what your dealer said about the B/T, that would be a bonus if that was in there.....here's hoping.