Wino
Agree, according to AirBus, they stated that the correct procedure for extending the gear was the alternating rudder inputs you refer. I would assume gear extension speed is something short of 250K, but could certainly be high enough to cause potential structural damage if excessive rudder is applied. Accordingly, what speed restriction is noted for this alternating rudder procedure. During the same exchange, AA indicated their procedure was to bank the airplane rather than yaw.