I think you're getting your aircraft manufacturers mixed up. On all modern Airbus airliners, there is no physical link between the two pilots' controls at all. On Boeing aircraft, the controls are physically linked and both move even when one pilot is making inputs. On the 777-300ER, if both pilots are making inputs, and those inputs differ enough, then the physical link can be disabled and then the inputs are considered "desynchronized" and only then to the inputs become averaged.