I believe I was the one that spawned on the NE hill, so I just remained there. I do believe the Hill's are random just like the dolls in demo on Stali. Also, if you recall, spawning is alternating each round and during the round from NE to SW.
If you think about it, when KOH was on a server by itself, we never really had a full server playing it, so it appeared that no one spawned on the hill or very seldom. When the server is at a peak traffic time, you are going to have people spawning on the hills.