SO NOW I WAS CURIOUS. I had to revisit the photos I took at the Folk Festival this past summer, and see if I could recognize patterns that would help me better understand how to make best use of the Silent Shutter - - - which I love using. At 9fps second it is crazy rattling off a ton of images in a few seconds without knowing you are even shooting.
Analyzing pics taken at different shutter speeds (because of the crazy light intensity changes that take place at concerts), I soon realized that faster shutter speeds intensified the problem. Slow shutter speeds of 1/40'th second and the like, did not exhibit any issues other than motion blur.
Where issues cropped up was with shutter speeds of 1/400'th of a second and higher. Pics taken at 1/160'th to 1/200'th may have some banding, but very subtle if there. Here are some examples:
1/800'th second with Electronic Shutter
1/200'th second with Electronic Shutter
An interesting find that I will have to test out if I ever feel the notion to - - - is that a few of the images show shutter speeds of 1,000'th to 1/2500'th second and there arrear to be no banding on them. It is hard for me to tell if those were taken after I went back to normal shutter, but I suspect they are also Silent Shutter.
One amazing feature with the Silent Shutter of the Olympus, is it's ability to extend the highest possible shutter speed to 1/16,000'th of a second from the normal high of 1/8,000'th of a second.