I started boxing late dec. 2009, and I have a 70 Pally with green gears and my experience is that NO, after
SM, my pally did not fair well in higher instances, say ZF!

I quested from 45 to 60. But the 3X experience is great and it wasn't so painful.
I would go to Hinterland, then do the two zones between BRD, thorium point and the other one opposite of the instance. Should get you to 55, and do WPL or Silithius. But then at 55, you can go through the portal and quest there too...

My setup was ABCDE, A being the booster (powerlvler). So having a 70 makes things a lot easier with questing.

SaraiE