On 8 November Blizzard raised the experience you get for killing enemies in WoW Forever dungeons by 50%. Kaivax announced it on the forums after a hotfix at about 11:05 PST, saying it should make going back for more dungeon runs feel better. It's also in Blizzard's hotfix notes.

How dungeon XP got here

When Change Source
1 October, beta Bonus experience from dungeon quests cut by 50% Development notes
8 October, beta Kill experience in dungeons up about 20% Same notes
8 November, live Kill experience in dungeons up 50% Kaivax

Blizzard's post doesn't say whether bosses count the same as other enemies, and it gives no number for how dungeon experience compares with the open world. Players on the forums still argue that dungeons give less than questing, and some threads quote their own penalty figures. We haven't seen Blizzard confirm any of them, so we don't repeat them here.

Is dungeon leveling worth it now

It depends on what's outside. Since launch, players have reported crowded zones where quest enemies die the moment they spawn. When that happens, a dungeon with a steady group is the more reliable way to level, and the dungeon quests and gear come on top. If your layer is quiet and your quests are in one area, questing is still quick.

A good routine for most players:

  1. Quest until a dungeon fits your level, picking up its quests on the way. See dungeons in level order.
  2. Run it once or twice with all the quests.
  3. Go back out when the run stops giving upgrades.

Healers and tanks find groups fastest, so they get the most out of this change. Our Dungeon Finder guide covers grouping, and how long it takes to level has the rest of the leveling picture.