That's interesting--I'd never thought of it in those terms.

I know that with video-games, the force I use to press the buttons varies _dramatically_ from game-to-game, even though the controller stays the same (depends on personal stress, responsiveness of the on-screen UI, etc).

I suppose a case could be made that unresponsive interfaces tend to make a person type/click more deliberately (i.e. forcefully) than is technically required by the input device.