[uygi]

Even in Live beta it was commonly known that dungeons had a bonus. It could have easily been a myth, though. Most things commonly known then were myths: You have to loot the old corpses to spawn more mobs; early invis breaks are caused by being out of food/water; Pristine Scarab Carapaces only drop if you kill with non-melee, otherwise it will crack; INT governs tradeskill skillups while WIS reduces failures, etc etc.