Well, ncsugrad54, I have one aussie that doesn't bark at all and one that barks when she plays, as in agility. She could have been a huge barker, but I did a lot of selfcontrol training.
I know some borders that bark like mad.
I think it is a training issue. Difficult to solve, but it can be done.
I really don't like the barkers outside the agility course. I did not want my dog to do that, so I worked very hard to keep her from doing that.
Jinx does bark in the course of a run, but I don't mind that. She is allowed to express herself, just not like a mad dog