I've once tried using different devices to render a down-scaled version the full-stitch of XKCD Click and Drag. No device I've tried can allow me to zoom and pan at 60fps. On my Mac, there is some noticeable latency when quickly zooming or panning, and it's definitely not 60fps. I have no reason to believe any old Android phone will do it better.

Now I don't doubt that an image viewer specially optimized for zooming and panning huge images like this can do it at 60fps. The typical image viewer likely does not.