Run a statistical analysis of the values in the .cr2 and you see the banding numerically. Absolutely no subjective or defice dependent component.
Is this banding on the sensor, or like, in the image above, is it the LCD screen on back of camera, or even that pricey monitor that only handles 8-bits per channel
Also: if it where an artefact of the output channel image manipulation wouldn't work on it.
Just food for thoughtNo, not at all.