Rudder pressure is not nearly as important as rudder angle. The hinge point on your rudder has a dramatic impact on the pressure that you feel. A rudder that is not very deep, but is long fore and aft will create a lot of pressure if the hinge is along the leading edge. If the pivot point were further aft you would feel less pressure. Rudders that sweep aft also create more pressure but they don't pick up weeds as readily.
Some rudders have a hinge that slants forward.
Stars, Shields and most full keeled boats are good examples. When their rudders are turned hard some of the rudder's rotational force is lost because the forward slant of the hinge forces the rudder into more of a wedge. It begins to pull the stern down rather than to a side. In order for boats to sail upwind their keels have to suffer some leeway. It is this leeway that allows the keel to create lift.