Quote Originally Posted by Squintina View Post
All experience in dungeons (adds, bosses, completion, roulette) rewards scale in some form based on level.
While I admit I haven't studied this specifically, I do not believe this is the case. Certainly if the rewards do scale, it's not by much. If you queue for a low-level dungeon, you get experience appropriate to your synced level. Running a lower-level dungeon outside of a roulette gets you abysmal exp. (For instance, I know from recent experience that the experience per mob is about half in Brayflox's Longstop of what it is in the Stone Vigil when using your adventuring squadron.)

The reason leveling roulette gives a larger bonus for lower-level dungeons is to make up the gap from how much less the dungeon itself gives you.