It is clear that we are now earning our 2013 MileagePlus status with all new activity beginning January 1, 2012. With the extension of existing benefits, that's where the clarity ends for me. I am Platinum on CO. The 2011 OP program included confirmed upgrades beginning 5 days prior to departure. The 2012 MP program changes Platinum upgrade confirmations to beginning 3 days prior to departure. Is "everything" from OP being extended until the systems are merged, or only certain things? I have 2 flights that are currently within the 3 day window (I think they refer to it as "72 hours"), both have F seats open, but neither has been upgraded. PreMCO was pretty consistent about granting those upgrades when the window opened. PostMCO has started to hold onto them much longer, often until airport check-in. Because of this change in behavior, I can't tell which set of benefits is in place. Maybe it doesn't matter, but I would like to know if the window opens at 120 hours or 72 hours. Does ANYone know?