Has US given official notice to *A of its intention to exit? It was my understanding that six months' advance notice was required. If US intends to join OW as of 11/1 (and presumably leave *A), that could tie neatly with the reports of difficulties making award bookings with some *A carriers from 11/1 onward, but I can't imagine that "official" word of US giving notice wouldn't have gotten out by now if US had given it back in May.