Our visit with the therapist last night was very productive. We discussed N's OCD behaviors at length. Dr. R recommended a book called "Brain Lock" by Schwartz and Bevette. I've also heard some parents at http://aroundthedinnertable.org/ recommend a book called "Off The Cuff" by Nancy Zucker (Duke). I've looked for that second title and haven't been able to find it.
Anyway, Dr. R described N's OCD behaviors as a distraction. He called them a waste of time that distracts you from important stuff. He illustrated how much time and energy it took to maintain all the OCD stuff. N was very persuaded by his explanation and has already eliminated most of the behaviors. Hopefully it sticks.