Blizzard has announced that the bugged warlock talents Wrathful Minion and Demonic Inspiration are fixed. These bugs caused Warlocks to massively overperform in the last 24 hours.
Warlock's DPS has been crazy high since Patch 10.0.7 as Wrathful Minion and Demonic Inspiration were bugged, providing their bonuses to the Warlock as well. This has now been fixed and should bring Warlocks more in line.
Read more on wowhead.com