There have been several samples floating about now that people in the USA are receiving their orders. The raw samples, unlike the raw NEFs from the D7000/D5100, behave poorly when the shadows are brought up. There is a distinct banding pattern that appears to be an issue with the DAC/readout-process that creates evenly spaced horizontal lines (in landscape orientation) on recoveries of 2EV and up. This is not unlike the banding visible in the early 5D mk2 samples. I see this as a major strike against a camera replacing the excellent sensor of the D5100/D7000. I definitely would not trade "up" in this case.