Although at times contentious, the current recruitment promotion has certainly sped up leveling. The triple experience point bonus comes to mind first, but the ability to give levels at a rate of one per two gained is also a real boon. The rule is that the levels can be applied to a character lower than the givers current level, capped at level 60. Theoretically someone who has reached level 60 could donate enough levels to raise another character from 30-59* in a matter of minutes.
This new mechanic is pretty easy to use and potentially abuse. Málfurion of Wildhammer is not happy with the change. To quote "I just saw a Warlock go from level 31-59 in 10 seconds in front of my eyes... The new recruit a friend is bull > <.... NERF NERF NERF!" The post was met with some disbelief, but it clearly is a possibility. Some players indicated that they have something similar in mind. Abilene of Aegwynn believes that this practice ruins the game for some.