You are actually right on Sean. I discuss this a while back with distributor Sumiko and REL dealer Ambrosia Audio; and they generally found it easiest to integrate the REL subs in the corner with a low setting. They said the setting had to be raised as they moved the REL away from the corner. Low Bass is felt more than heard; so putting the REL in the corner helps fill the room with low bass in part by using the room's resonance. The bass seems more directional to me out in the room.
If you have an old house with more flexible floors and/or hardwood floors, the corner may be too much.