Why does Seadragon feel right?

On first use, Seadragon gives one an astonishing and almost physical sensation.

Seadragon uses a spring function for motion control. Sin or Cos is often used for motion control, but it does not feel so right-on.

In wondering why this is, I'm thinking that anyone that has ever played with a spring or a slinky has developed a mono-synaptic memory for it. That is, you have a so-called "muscle-memory" of the physical sensation. Tonight I'm thinking that's why Seadragon feels so comfortable and correct.