For small aircraft (FAA part 23/CAR3) the certification requirement is the aircraft must be able to handle a cross wind value of 20 % of VSo. For most light aircraft this would be a very low value so the test pilots demonstrate the aircraft can land at a higher wind speed.
Most Mooneys I've seen have a maximum demonstrated crosswind component of 11 kt, exactly 20% of Vs0. Maybe the Mooney test pilot was late for a hot date?
