It's the new way they do experience. Every monster type has a challenge rating instead of a fixed number of xp points. How much (if anything) you get depends on the CR vs your average party level.
Since you got very little for taking out the duergar, tough though they may seem, the game considers your team to be far superior to the enemy. Likely you only got points for the leader and a couple of others.
You'll probably see more of that as you continue through the game. So it's vital to do as many quests as possible. That's how you receive the most points.
Nightowl2
|