Booked a RT IAH-DFW-HKG on 1/6/15 for 2/4-2/11. Upgrade outbound cleared about 72 hours before departure and I was able to confirm return upgrade at T-48. Interestingly, I got the notification from EF that C was available before AA upgraded me. The phone agent took care of it manually. My other RT from IAH-HKG cleared as well in October.