It has some influence, because the window that is scanned has more lines to scan. The scan rate is per line - with fewer lines to scan a frame can be scanned quicker. That said, when you crop it, the scan time within the crop will be just the same
think about what you just posted, lets reference a light pole or fence post which is what reviewers always post as their point of reference. how much less distortion in a percentage would you say shooting vertical would make π
I already addressed what would happen panning in the same dimension as the roll: compression, or expansion. So, instead of:
o o o o
o o o o
o o o o
you might get:
o o o o
o o o o horizontally compressed
o o o o
or:
o o o o
o o o o horizontally expanded
o o o o
instead of:
o o o o
o o o o
o o o o
Human eye is very sensitive to angle, but corrects size (compression-expansion) pretty well - in this sense yes, panning horisontally with rotated sensor makes different and less noticeable distortion for vertical objects than using normally oriented sensor.
For rotating fan blades there won't be any difference. Evidently Donald B prefers light poles to rotating fans :)
so im a portrait shooter and most sports magazine images are vertical. so shooting electronic shutter in portrait mode there is no rolling shutter effect, my a74 and my a6300 have enough pixels on the shortest side to capture 4k video and make use of open gate so why dont we have this feature. why dont reviewers actually show there is NO rolling shutter in portrait mode. i can tell you why because they all arnt as smart as they like to think, and cant think outside the square ππ