While I don't have any specific knowledge regarding how nice cheerleaders are, I think bullies can come from all different backgrounds and it a impossible to know exactly who is bullying who sometimes.
There seems to be a trend that bullying in college or university as opposed to school is more acceptable, and it doesn't get taken as seriously. Maybe that's down to the age of the people involved, the older you are, the more you should be able to stick up for yourself maybe?
Either way, in my eyes a bully is a bully and needs to be dealt with regardless of the age.