I was not aware of that. I guess it probably isn't noticeable for most types of flying.

As for the control horns, that was my point about various linkage designs. They could either give you a mechanical advantage or perhaps even a disadvantage depending on how it is set up. That will dictate servo power requirements as well.

Like ClintH said, with the linkage on the very tip of the servo horn and closer to the hinge on the surface, you'd get maximum travel, ideal for 3D but you'll be at a mechanical disadvantage and require a stronger servo. flip that arrangement around though with the linkage close to the servo shaft and at the tip of the surface horn and you have a mechanical advantage. Less servo power will be required to do the job but there will be less throw.

For every advantage, there is generally a corresponding disadvantage. Designing anything is sometimes a bunch of compromises to ultimately achieve a goal.