My toons are 75% of the way through 69 now (4 Shaman) and I did *every* quest post 60 including all of the crappy collection quests. I was scared to hit like 68 or 69 and be done with all the quests through Shadowmoon Valley... And with good reason! I did 20% of level 67 in Auchindoun doing the questline to bring Thrall to Outlands and now I've only got a dozen quests left in Shadowmoon.

If I hadn't of done all of those collection quests I'd have been left with 30-40% or more of level 69 with no quests to do. Now, I love my instancing but I'd rather just quest it all the way up