Seems to me that as some vehicle becomes more "mainstream" the operators are less likely to wave. I noticed this phenomenon when I got my RX7 in 1979, other owners waved but by the time I sold it the waving was limited to a few long time owners and the new model owners almost never waved. I've also noticed this with the Road Glide riders, when I first got mine it was like a secret society. Now that they have been discovered I seldom get waves, Oh well, that's the price for popularity.
When I started riding in the 60s almost everyone waved and this lasted until the 80s when the boom years began. At first it seemed new riders seemed confused by this waving but as the years passed it seemed it was just a new type of rider, not someone who felt a connection to the motorcycle community.
Having said that, like most I don't wave at big rallys because I would spend the entire week with my hand in the air. I do like the idea of attaching a plastic wavey hand and may try that next year. :bigsmiley24: