Reminds me of when some buddies and I would ride our mtb bikes (slick tires of course) from down town Tampa to the Treasure Island beach. We'd take all sorts of back roads and what not to get there and not get killed in the process. Everytime we would do such a trip there would be roadies taking similar routes. There wasn't any "get out of the way" type stuff but I did notice very quickly that roadies, or at least the ones we ran into, were very unfriendly. I'd wave, say hey, nod or whatever and not a single time did I get any response. I asked 3-4 other mtb guys and they said that was also their experience. I've also had the mtb bikes in the back of the truck (in plain site) and still won't get any nod, wave, hello, wink, curse, spit......nothing. It is as if roadies are indifferent to mtb bikers. Even Harley guys typically wave to the crotch rockets/sport bikes. Of course I do understand that waving may not be an option when hunched over like that and it could be my imagination. I don't really think it's my imagination though.
Don't both groups have a love for the same thing?