I saw that Toyota INFO to. What bothers is this line "while the cause of this concern remains under investigation". And it's dated 17/9-2012 aka yesterday. I'm starting to think they still haven't figured out what to do.
If your FRS/BRZ/GT86 doesn't have any idle issue, test the above and see if you get any bad idle after testing their procedure.
Also i have an update for myself. Got a call from my shop, they will replace VVT Cam Sprocket and OCV first, ETA on parts 28 of September!!!