Quests range in difficulty from simple to complex, and completion time from 30 seconds to a year. Any action on Gaia can be used as a quest trigger. If a trigger is already completed when a quest is started, the quest reward is granted instantly.
The Gaia Staff have stated that when they release backwings, they will be released through a quest system to avoid giving older users an advantage over newbies. The speculation of how they will be released is by use of the Gaia Achievements system.