According to my reservations, the new Rio route is a 788, not a 789; so it surely must be a typo. My CW bookings in December and January were on 772s but are now on three-class 788s and I'm in the front row. You can also see from the sales schedule that F disappears in late October and returns in late March, and they have already down-graded many F bookings during that period, as can be confirmed by posts upthread.