My 18-55 kit lens says G on it (in the gold lettering), don't have the 55-200VR but I suspect it will say G on the lens as well. They don't always quote the full code in the literature as it becomes an alphabet soup.
I would love to get the 70-300VR for the VR, but finances say stick with my Sigma 70-300 APO and use a tripod
I've got the 70-300VR and I really like it. The VR works well and the optics are pretty good - better than I'd hoped they would be. There are some photos taken with it on my flickr pages - I've tagged most of them which if you're interested can be found here:
am quite amazed by those shots... had been considering a longer lens and was looking at the 2.8 options (cheaper 80-200 nikon and 70-200 sigma not the 70-200vr) but will now have to give this lens some serious consideration.
Doing the math, a cropped 300mm lens needs ideally about 1/500th to ensure no camera shake. VR gains you about 3-4 stops, so that pulls it back to 1/60th. If your subject is stationary/slow moving (eg bird on branch), VR is going to be amazingly useful. However, if your subject is fast moving (eg sports, or bird in flight), you're going to need 1/500th or more anyway, so the VR is far less useful than say f2.8
If you want to freeze fast moving action in low light then you need a faster wider aperture this isn't what VR is there to replace. If you just want low light/long focal length hand holding ability then VR does this very well.
If you have a steady hand you can get keepers and 300mm and 1/30th if the subject is still.