Looks like the "bots" that you used to show up every few refreshes a while back. That's what artificially pushed everyone higher before (myself included). Haven't seen any of this in Gold4 yet today.
I had the same thing about 3 hours ago! I was able to clear 10 teams and net 20 silver tokens. Now I am only a few medals away from being done with a PVP mission. I doubt it will happen again, but I hope it does!