I would imagine the D2 doesn't have the same dynamic range, or captures the same amount of detail the larger sensor in in the DP1/2 is capable of. What I've seen so far with the D2, I'm more than happy with, and can only expect that to grow as I learn how to use this camera to it's full capability. The 2/3" sensor and that big, bright, beautiful Summicron lens is perfectly combined to render wonderful photographs. Handling the D2 is pure joy. Lens rings allow you to set aperture, focus, and zoom, with analog controls on the top deck for shutter speed and metering. The few settings that are menu driven are easily accessible and simple to adjust. I was able to find and adjust 95% of the settings without cracking open the manual. I've said it before, and I'll say it again. The design and operation of this camera is pure genius. I can see myself owning 3 or 4 of these (and or it's brother the Panasonic LC1) within a year.
John