Hmm, well thanks Brohg, but that hasn't been my experience so far.
We were keeping the area around where the restrained cereton (poor friendless sob) used to spawn clear for quite a while. We were hoping to see him and nothing ever spawned but members of the controlling faction in the surrounding spawn points and nothing in the cereton spawn point. Incidentally, pre-patch, we also found the cereton spawned once at the ramp into the tower. Every other time he had been spawned over in the east corner. In general, mobs were instantly repoping the first 2 times you killed them, then after the 3rd kill they would stay down for a while. I suppose we can try again, but I am skeptical.
We always have 1 or more obsessive trackers in group.