could you please explain this to me a little more, as you would for, say, your wife (supposing she does not develop mac os' kernel extensions, too)? This is not a provocation, it's just the fact that for the first time in my life, the mouse movements felt "natural" were on a mac machine. I've been using mice since the 80s with a 256x192 screen (a msx: the mouse didn't even had the ball - the wheels touched the surface), and it always felt, don't know how to say, ackward. Windows feels strange to me, linux feels just weird. But OS/2 actually felt a little better.
So I would like to understand the question a little bit better, if possible.
Turn the "Tracking Speed" to the fastest possible. Now to try to use the mouse. You will notice the lower "step" does not change in speed, however when you cross the step boundary, the cursor starts flying (though still not that fast). the step boundary is arbitrary and not something a human can learn by muscle memory. In fact the most precise mouse users (gamers) usually turn off mouse acceleration so that they can have muscle memory for mouse vs screen locations. In the real world however some acceleration is good because you may be trying to pin-point 1-2 pixels, and at the same time want to be able to move the cursor to different parts of the screen without getting visual feedback because it's slow. You want to click a button, move the mouse and click without thinking - it should be natural.