I hadn't heard that but possibly.
My reasoning is that the Carbon Black edition, that comes with the Carbon pack, which is essentially grey, looks better with the Titanium Matt Gloss wheels. Whereas with the Gloss Black pack, that comes on the Vorsprung edition, the Gloss Black turned wheels look correct.
Indeed this is the way that most of the cars that have been tested by the press/bloggers on youtube etc and are German spec are configured.
its frustrating in the UK, that when ordering a car such as this you cant specify the colour of the wheels as you can in Germany, France etc