Well it would be if that's the question I wondered about.
Used IS from Oly, Canon, Nikon and Sony and they all seem to help in the proper setting. If one is a stop or two better, fine. But my question was not "DO" or "HOW MUCH". My question was "HOW"
No problem. No one who's answered seems to really know but likely different manufacturers use different ones unless they license.
Secondly, there is a great deal of difference in a system moving a small mass far and a large mass a very small distance. Yes, it's possible to do the same "work", but the Engineering is very different. Anyway I suspect they are moving a very small mass a very small amount
In order to stabilize a given camera movement "x", you could either move the sensor by "y" or some optical element by "z".
As long as no one has offered estimates on how large those movements might be, the mass that needs to be moved, or the intrinsic limitations to either stabilization approach (image circle etc), I feel that concentrating on _one_ parameter is a bad idea. Hint: moving a large mass by a small amount need not be any "harder" than moving a small mass by a large amount.
Would it not be more fruitful to discuss actual performance of various stabilization systems? I believe that there are standardized tests out there?
-h