Well, while the 4.0.1 revamp did make it, technically speaking, even easier to level in any spec, with any kind of pet, it did have an unintended side effect. Now that you can have loads of pets, and aren't limited to using a wolf in raids, you are free to go and tame this: http://www.wowhead.com/npc=30423
. But you have to be level 80 or thereabouts to do so. Which means 79 levels of ghost worm-less misery, a pointless, soul-crushing trudge towards that hallowed goal while less considerate hunter types (HI!) jump around you in circles with their ethereal uber-minions while you're traipsing across Un'goro looking for a devilsaur, wishing the pain would end. Not worth it, frankly. Buy your character on ebay, and uphold the reputation that hunters have struggled long and hard to earn.