> I tend to use it up to 1/1000 >and haven't noticed a problem.
I try to follow the advice by Thom and keep VR ON only with shutter speeds below 1/640s. My assumption is that the 1/1000 the shutter speed is too fast to notice any imperfections introduced by a user or by the VR system. But what described in byThom article makes sense to me (as to a former engineer) and i treat that as a true statement - above 1/500s, and using second generation VR, the image might/should benefit from turning VR OFF above 1/500s shutter speed. It does not mean we will notice a dramatic difference in shurpness, if we will not turn VR off at high shutter speed, and definetelly nothing that cannot be corrected in PP. Leaving VR on on even higher shutter speeds probably makes even less blur effect. IMHO the only shutter speeds are really affected are between 1/500 and 1/1000 by VR.
The new VR-III, introduced recently, might allow us to use higher shutter speed without introducing any blur, but this is only my speculation.
Personally, I have very steady hands and brace myself with a monopod so treat it as a tripod so I switch VR off on both my Nikon 70-300 VR and 70-200mm VR. Also on my Sigma 50-500mm OS. That's just me mind
I think you will find that although the capability for shooting a few stops lower has advanced with VRII etc, the basic principles of its usage is still the same today as it was when Thom Hogan wrote that article. The confusion for me comes with the difference between monopod and tripod, as to me a very steady monopod for a static shot is very similar to a tripod, its when the target moves that VR may come into play and the camera is no longer steady. Of course many lenses now come with VR tripod mode. This mode automatically differentiates the frequency of the vibration from that of camera shake, and changes algorithm to correct image blur caused by slight tripod vibration.
No matter what the reason the same applies today as it ever did and VR is really only intended for lower speed shutter shots in my view.