My Best Buy here in Coralville, IA we just displayed the C7000 in the experience room with 3D glasses on demo. I thought the uncalibrated out of the box 3D looked great even for just a 5 minute demo I was extremely impressed! This TV needs serious calibration, and the backlight bleeding was atrocious, but I'm sure we could have easily dialed it down if we didn't have a line of people wanting to test it out. I do think it is important to sit closer to the TV to get the full experience. We were demoing it for customers, some couldn't take 10 seconds of 3D without pulling the glasses off, while others were blown away over how cool the Monsters vs Aliens clip looked. The ones not enjoying it were mostly the wives who looked at the $2900 price tag, haha.
I enjoyed the 3D experience, I am definitely a fan, but will wait for the TV's to become more commonplace and in my budget in a year or 2. Those buying the C7000 now though will not regret it.