I've noticed the same, not sure what that's all about. I've noticed the chance of a wave quite possibly depends on whether said driver has the missus in the passenger seat
Back in 2000ish, a lot Westfield owners I met were quite snobbish, if it wasn't brand new and wasn't powered by a 600bhp engine, then you got shunned at local meets. People buying older pre-built cars were not regarded very highly at all and in many ways the WSCC boardroom was not a hell of a lot different.
The club is now feeling much more relaxed and welcoming of all Westfield (and even non-Westfield) owners, regardless of the cars age/spec or anything else for that matter.
BUT I can't help feeling that others outside the WSCC, see us as being a bit like how Caterham owners were perceived 10 years ago (and probably still are).
Then there are those who drive things like Cobra replica's (DAX, etc), these people probably don't want to admit they're driving a kit car.