According to this thread, the maps for the 2011 cds are provided by TomTom.

I noticed this week that the 2011 cds were giving me some odd routings so I finally ran the TT app on my iPhone at the same time and the app did a better job that the BMW nav in terms of routing choices.

I know OKC might not be a good test case but just wondering how the 2011 maps look to others.