I have had vettes since 1961 and have seen the "brotherhood" decline over the years. When vettes were few and far between you felt part of a special group if you had one and always waved or gave a thumbs up, but over the years, as production increased, more and more people who were not true enthusiasts got vettes. I have especially noticed the wave disappear over the past 10 years. My waves have actually brought angry stares from other vette drivers.
I will keep waving any way, just out of habit.