Image stabilization counters physical motion and thereby decreases blurring of images. Shutter shock is also physical motion so it might be corrected by image stabilization. However it might also not correct it because both effects could be on different time scales (maybe shutter shock happens too fast?). I was wondering if image stabilization counters shutter shock?
The reason I ask is because I`m considering buying a second hand sony a7r, which is known to have terrible blurring from shutter shock at shutter speeds between 1/2 and 1/200 second. Most likely I would use the body with a lens with image stabilization. I have found one photographer explicitly turning off image stabilization when examining shutter shock. But I have not found anyone directly examining if image stabilization counters shutter shock.
I did find two people saying that image stabilization does not counter shutter shock, but that seems to be expert opinion and not tested. After rereading that first link and clicking a link in that post I found someone testing the effect of IS on shutter shock. It seems IS worsens shutter shock on the a7r, at least with 200mm focal length and shutter speeds longer than 1/1000 s.