Another thing is where the 'wing tip' line is drawn, or more precisely what bit is going to drop off when enough damage has been caused. Obviously it's down to HTC coad but I wonder if its based on something definite like wingloading, or actual design of the plane in question.
Theres not many more annoying things for me, than to chase a 51 and finally get close enough to do damage, blow a wingtip off and have the bleedin thing pull away again. Might as well fit them with explosive bolts so they can jettison them for the extra mph.