Never knew this would generate so much interest.
DaZ: To answer your question, it's unlikely you will see an improvement, but I have no idea for sure. TNT1 probably cannot display precisely enough for the BNC cable to make a difference. Just a guess though.
oldfart: For a baseline, I saw an improvement at 1280x1024x32bit. However, I also saw a difference in brightness, which is unrelated to resolution. I thought that was interesting. Maybe NEC just sends crap cables with their monitors -- I have no idea.