"Calibrated Dec 2009" on my iMac, "Supercal Calibration Jan 2010" at work. The first thing I do whenever I get a new computer is calibrate the display (with Advanced options), and I generally re-calibrate every six months or so just in case it's drifted.
Why anyone who's aware the option is there would not calibrate their monitor is a mystery to me--it can make a HUGE difference, particularly on cheaper/older displays. Heck, if I ran Apple I'd have the calibration routine launch as part of the new-system setup process.