I booked a mixed metal HNL-SAN (through SFO) flight yesterday on continental.com. This morning I saw that I had both a Continental confirmation number as well as a United one. So I looked up my reservation on United.com and it shows "Upgrade Pending" on all the UA metal flights. It didn't show anything on the CO metal flights, and I didn't expect it to, since in my experience the upgrade process on CO is very opaque, if not willingly obfuscated.

My question is, which communication method will survive the merger?