You fellas would be glad to know - there is no rolling shutter issues with the electronic shutter on the V1. It seems like a global electronic shutter, honestly. I could detect no rolling shutter at all in my shots of propeller driven aircraft that I shot today. The props are all perfectly strait. As a matter of fact, there was no way for me to tell I was even using the electronic shutter over the mechanical one from just looking at the shots.
Whatever Nikon has done on the Nikon 1, it's working - very well. I also did some preliminary rolling shutter video tests last night and compared them with the Olympus EP-3 and the results were jaw dropping.
I'll hold future comment until I'm done with my testing and publish the article. Just wanted to pass this a long, for now.