Bruce,
I just tried it and I could not tell any difference from one mode to the other. Here is a practical application: I took a picture of my daughter and her cat with the cat licking her nose. It took me 3 tries to nail it.
I really like the D2. I wanted a walking around and vacation camera - I got tired of lugging around my Nikon D100 stuff. The price is insane (so am I) but it is really well thought out and images remind me of the old Agfachrome (if that makes sense to you). I also like the way it feels and looks. The only complaint that I have is that there is quite a bit of shadow noise at ISO400. 200 is quite usable, and 100 in 11x14 test prints the image is very smooth. Also manual focusing is not so good. The inherent depth of field prevents the image from poping in and out of focus. You can zoom out to 90mm, focus, and zoom back. Might be useful for sports and the like.
Hope this helps,
Michael