I'm gonna mix it up. First team i jumped there the second after dinging 68, and leveled to 70 quickly. I had a paladin waiting at 70 so i ditched a mage, and started with my new 5 man team. My second team is going to go at 70, just so I can skip a feq early collection quests and get to the next zone quicker. I like doing it differently, makes it less monotonous. I did the same in outland, from 60-70 on a couple teams, one hitting instances hard to skip some content i didnt want to do that I did on the other team just previously. I might even keep my druid team in outland (farming cenarion rep for Earthwarden) until I hit 71-72, just 'cause.