Creating New Characters

So, with the character copy being so busy (and understandably so), I thought it'd be a good idea to roll a Worgen or a Goblin to see what the new starting areas were like. However, despite having installed the PTR client and letting it download all the way to "Available", I notice that Worgen and Goblins are still unavailable. Furthermore, none of the new race-class combinations are available either. Is this how it's supposed to be, for the purposes of the PTR, or is there something I'm doing wrong?