Thought I would chime in on this one. I too have the NAV touch screen in my 2012 and kinda think its a POS.
Try living in rural South Dakota and see what roads show up! Makes me laugh. There was a new on/off ramp built on the exit I use to go home about 3 years ago... It still shows me driving in a field when I am on the new exit.
Anyway I wanted to subscribe to this thread so when you post what you find out I will see it.