This can happen to technically savvy users as well. For instance, when hard disks were only just becoming common, people were used to saving things to floppy disk, which was slow and loud. Hitting save typically meant the whole machine pausing for several seconds while you heard mechanical noises. When using hard drives for the first time, it wasn’t uncommon for people to keep hitting save repeatedly because they suddenly stopped getting the feedback they associated with saving. A similar effect occurs when moving from dial-up to broadband; and from whole page refreshes to Ajax.