People good with PCs

[Krayce]

If you turn on the vsync, well it will be smooth, but if your computer settings has the triple-buffering activated, you will have a delay between your actions (keyboard etc...) and the screen.

I agree about this comparaison!
In fact, it's between the number of image given by the game and the number of image that your monitor can display.
We can see an example of what can happens if the numbers to display is too high:


The delay between your actions (keyboard...) and the screens, it's determined by "ms" millesecond (you can watch it on your monitor data sheet) and that's between output and input devices;
Anyway, I understood on what you meant...