when you click save or when memory has to be paged/loaded, etc, yes.

when it comes to responding to user input - while memory is being swapped, yes.

in contrast, even when the computer wasn't responding, it never lost keystrokes. I'd type ahead and then the characters would appear when it was ready.

now, the windows computer just randomly loses characters and loses focus for no reason. if it's not paying attention when you're typing or clicking, it just won't respond.