I disagree on the prosumer assessment. It is similar in size to the F6 film camera, and certainly is able to do just about anything. It's body, weather sealing, shutter life are every bit as capable as the D2xs.
I think it offers more flexibility than the D3 because you can shed the bulkiness when you don't need it by leaving off the vertical grip. Prosumer?... nope. To be a prosumer, it would have more of the D70/D80 sort of build and features.