The larger the plane the easier it is to fly. Simply put it's much harder to hover a small plane vs a 40% plane and maintain that flawless control that you are looking for...

I'd say if someone can hover a small .40 size airplane with enough control to be able to walk up and grab it from the air then it's under enough control however at the same time it's not hovering so still that is not moving in some way or another. It requires constant inputs to help maintain the hover as well as the big birds do but you see the movements alot easier in the smaller planes...