I have not boasted in ST since last year when they removed or they lowered the exp for killing the skeletons. However, I never stayed in SM after level 40. It just seem to not be worth the time. However, this was pre RAF and pre triple exsperence. For me 40 to 60 goes pretty fast. I generall just hit Tanaris and stay there for awhile. The quest are pretty easy and I love ZF one of my favorite instances in the game.

My two bits. I hope that helps some.