Well, check it out for yourselves. This woman stopped me in the street to give me a quest and when the dialog ended, the camera started following her rather than my character. She's still an NPC, I have no control over her at all. I tried following her around, but it's surprisingly hard when you can't see what your own character is doing.
http://www.youtube.com/watch?v=nsvpQMotBxo
http://www.youtube.com/watch?v=nsvpQMotBxo