Watching this game you can see yellow/blue teaming up without ever speaking or communicating. They are a team from turn 1.

A closer look reveals that most of the time only one of them moves while the other one doesn't. If the moving part changes the move occurs late.

I don't say that this is proofing anything or is sufficient material, but it might give an idea of some players that could deserve some observation.

http://kdice.com/games/75563532