Just bought a Supersix, but I had LBS order a leftover 2011 from Cdale. Why? Cuz I wanted DA7900 and that is no longer available on the Supersix -- only Ultegra. You have to upgrade to the Evo frame to get DA, and that costs $2k more than DA on a Supersix.
Bike came in this week, I'm out of town but getting back tomorrow, will pick up Monday. Getting stoked!