Levelled 1-50 as a healing sorc, it's really not hard at all. You just have to spend more time healing your companion than doing damage yourself. Plus Xalek makes the last few levels a breeze.
He's been doing it since launch (or early access, didn't visit the forums till the 20th). I'm really not surprised in the least he has another thread going.
Hyper-grind? You must be new to MMOs...
Kids these days...back in my day we had to walk uphill both ways in 3 feet of snow just for a single bar of exp. And you think we complained? Nope, we took it on the chin and asked for more.
Edit: Oh wait this is a shadysketch thread. Nothing to see here, move along...