We did try to rapidly empty tankers when called upon in the good old days when the F4 was our grown up toy. A late night call for trade was often answered in order to help a Victor crew to get to their night-flying supper. A 3-bag F4 on each wing hose at 36,000ft needed reheat to fill to full and selection of wing dump at the same time depleted the Victor's load in double-quick time. For some reason the Victor crews were not allowed to dump fuel but we were.