In a new video posted by iFixit, the recently announced iPad mini is torn down and a jelly scrolling effect is also explained.

This so-called “jelly scroll” effect is not new. It has to do with the orientation of the controller board and the direction that user is scrolling. Because the screen refreshes by scanning from one side to the other, scrolling in the direction that’s perpendicular to the direction of the scan may appear like its scrolling unevenly in some cases, particularly when using the iPad in a vertical orientation.
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