Pet Battle XP hotfixed

We're getting reports of insane experience gains for players via winning pet battles. Because the XP being awarded was affected by heirlooms and XP buffs -- like the Darkmoon Faire Carousel buff -- people were leveling characters from 1 to 89 in a matter of hours. (Experience for pet battles stops at level 89 and you get a chance for Lesser Charms of Good Fortune, instead.)

Community Manager Zarhym had this to say on the subject on Thursday afternoon:

The XP scales with your level and how close your pets are to the pets you defeat. XP is earned via battling pets in the wild, pet tamer NPCs, and other players in pet battle PvP. No experience is gained from pet battle duels or if your highest pet is more than 5 levels above the pets you are fighting. The amount received before the nerf was roughly what a character gets from completing the capital city cooking and fishing dailies.

Because you can get XP from battling level 1 wild pets, people were camping out in major cities and decimating the battle pet population while leveling their low level pets.

As of this morning, it looks like all realms have been hotfixed so that the experience is approximately 10% of what it was. We have no further official word on the nerf as of this writing, but we'll keep you posted.

Update: It looks like from the comments and my experimentation that the nerf is scaled. While it is no longer worth it to hang around Stormwind and kill level 1 pets, if you battle in level appropriate zones with level appropriate characters, the XP gain is still worthwhile.