It really just depends more on the person. Both skiers and riders can be douche bags and I have definitely met both kinds on the slopes and chairlifts. Snowboarders are still stereotyped though, which is unfortunate.
The other day I was at our local hill, and this skieródressed in jeansósaid "These worthless snowboarders have to sit down and strap their feet in each time they start a run." I was just like, wow, what a douche. There will always be assholes on the slopes and I guess the best way to deal with them it to just not let their crap bother you. I could have easily responded back to him with a compliment on his "jeans" HaHa, soaked all the way through I might add. But I just kept my mouth shut.
On the other side of the spectrum, I have talk to skiers, good ones at that, who express a big interest in snowboarding, and were just cool as shit.