I always wave, flash lights, give some sign of recognition for other Prius drivers - when passing (or being passed - my cohort on the thruway that I occasionally travel with is not as concerned with his ultimate mileage as I am!), we acknowledge each other.

This isn't uncommon though - it started with my father's 64 Corvette, I also met another early-edition Golf GTI driver (eventually turned out to be the guy I bought parts from!) and of course, all the motorcycles I have had - all but Harley riders generally wave back.

But - I have only seen two insights parked of late - none on the road - and though I look for the HOndas, their stealth is far to hard for me to track while driving!

But I qalways try to wave to any hybrid. I think I may be confusing the one First Generation Prius I occasionally see on the road!

Jack

Eschew Obfuscation
Avoid pompous prolixity
If it ain't broke, fix it until it is.