[eridius]

Agreed. The writer here doesn't seem to know what he's talking about. The reason things like WebKit tiles and images in tables don't populate while you're actively scrolling is because of an intentional choice on the part of the programmer. When you're touching the screen the run loop is put into a different mode than the default, and authors tend to write code such that expensive operations (like populating thumbnails in a table) simply don't occur unless the run loop is in the default mode. In fact, a naïve implementation of a tableview with thumbnails will populate those thumbnails as you scroll, and this has a noticeable effect on frame rates.