There's such a 'class distinction' between cyclists, I gave up waving, unless someone waves to me first. Sometimes, it's a guy who's on a real hard mash and doesn't have time to be nice. Sometimes it a pretentious 'fred' on a 3000.00 Waterford who's out for a recreational cruise. I try to take each as it comes and never take it personally. BUT, I NEVER wave first, anymore.