Thom talks a lot of nonsense sometimes. We've had lengthy debates about that link before. You'll notice the complete absense of pictorial evidence, which would surely be very easy to produce if there was actually any truth in it. And I've never seen any reliable evidence, nobody was able to recreate the effect he talks about, and neither was I (using Canon).
IS/VR is one of the best inventions of recent years. It works, it's cheap, and there are no downsides. Even the cheapest kit zooms have it.
The best analogy I can think of is that IS/VR is like having a monopod permanently attached. I don't see how anyone can argue that's anything but a fantastic asset.
He's not talking nonsense in this case. I don't know what it's like on the Canon side, but on Nikon DSLRs VR is only activated with the half/full shutter press, not AF-On. The effect is worst between 1/300 and 1/2000 on a bright day - if you take a shot without letting the VR spool up, the change to the image path imparts a slight ghosting. I don't find it a problem - it is no issue if you either turn off VR or half press before the shot's taken - but to pretend it doesn't exist is disingenuous. It doesn't detract from the fact that VR is incredibly useful
....Honestly, Tara, no dissent intended, just interested to see what others thought of VR/IS.