Ive had skiers actually look uphill at me bombing down and purposely change their line...to coincide with mine! Yes it is the responsibility of the faster mover to avoid slower traffic, but when this shit happens, I will, at the very least, ride over their skis. That said...the last two people to run into me and cause damage to my board have been inexperienced boarders on trails far too advanced for them. Conclusion...I hate people all together!
But yes, skiers in particular, are far more snooty than any boarder I have come across. I think snowboarding is a humbling experience. People who have progressed have a great appreciation for the sport and tend to (on average) have far better attitudes toward others. That has been my mostly SoCal experience.