With the January 28 build, ArenaNet has made some changes to the dynamic scaling system. As first your attributes now reflect more accurately to what you should have at that level for a similarly geared character and as second the reward formula also got tweaked so its more rewarding for high-level players in low level zones.
Arenanet has just announced and created the event page for the January 28th update, Flame and Frost. This update is a prelude, meaning it is meant as a preparation for the upcoming months.
The update brings new features, such as achievement updates, laurel currency, guesting,new utility infusions and ascended amulets, and overall enhancements and updates. Make sure to check out the event page for the full details!