Nacra never had to make a settlement in a lawsuit regarding electrocution...they did, however, have to make an agreement regarding a lawsuit over a 5.2 that was taken offshore and partially sank (it was known to be leaky). Those on board decided to leave the boat for shore and met with some sort of peril. That's why post '83 Nacra boats use foam core hull construction.
I still beg to differ with your comptip assertation because the idea of the comptip is to reduce the frequency of electrocutions related to rolling a boat under a power line. It has nothing to do with lightning. I'm sure someone took an engineering, and common sense, perspective and figured that if the top three feet or so above the hound were plastic that it would prevent a certain number of injuries. The statistics that I've heard indicate that this is has preventend a lot of injury - that's common sense in my book. Personally, I would rather have my solid mast for the performance and reliability. Like I have done, I recommend that if you don't like it don't buy one.