In most cases, the farther back the binding is mounted, the stiffer the response will be from your skis. However, since their center of gravity is different from men's, many ski shops will adjust women's bindings so that they are slightly forward of center.
Some ski bindings actually have an adjustable fore/aft device, so that you can move them either forward or back depending on snow conditions. Others have an adjustable forward pressure that allows the bindings to adapt to torque when the skis bend or twist. Advanced skiers will often use ski bindings that contain rubber or some other sort of material that will work to dampen vibrations. This provides safety at high speeds.