not all 540 motors are the same, some are duds, i think that handout motors are a fantastic idea, but they should at least put the entire batch on a dyno and get rid of the top & bottom 10% of results, keep the tolerances of the motors to roughly the same across the board, after all the point of handout motors is to keep everyone racing with the same motor.
that being said, 540 cans are sealed & stock anyway, handout motors are more suited to stock & 19t events, where you have controlled motors that can actually be tampered with easily.