i have owned the 80-200AF and now the 80-200AFS. initially was kinda disappointed with the AFS cos comparing to the AF version, it seems that the pics from the AFS is not as sharp-that is for handheld. when mounted on a monopod. the AFS perform great in terms of AF as well as picture quality, thought picture wise seems about the same. i believe the AFS is a bit harder to handheld successively due to the bigger barrel. and wt, thus making the AFD look better handheld. however the difference is only evident at 66% or 100% crop size. in other words if you print in below 8R, is very difficult to see the difference. think with a monopod, AFS can perform well at shutter of 1/15 or 1/30. then one can also argue that a AFSVR and a monopod can do 1/2 or 1/8. would love to put my ahnds on teh AFSVR though to see how it perform.the Speed of the AFS alone is a worthy upgrade from the AFD, very fast and quiet.
just my 2cts worth.