Just checked on my D100 firmware update/calibration request on Nikon's web site. My camera's status is a under a B2 repair catagory which translated from the table provided on the site as "Moderate repair - Major parts replaced". So it seems I did have a defective model and I may be a happy camper when all is said and done. However the proof is in the pudding as they say so we shall see when it is back in my hands and how it performs. I will update here when I have tested the end result of Nikon's repair.
Just for the rest of you, I did as some other suggested and sent examples of pictures (3) on cd-rom, (unmodified, just as the camera processed them), a sheet with the pictures on it explaining my focus point and my own observations on each in terms of under-exposure and softness or focus and of course a letter requesting what I would like them to check on the camera.