The real question is how fast can you level your multibox to 60. I used the RAF to level 4 shammies, too bad that I didnt take a screenshot but I have to say getting 300% xp the whole time is very nice. I remember around level 40 when I had a few completed quests I leveled 2 levels in 30 min.

Managed to level 3 of my alts (on my main account who invited the others) to 60,60 and 58 (all with around 90% filled xp bars)