I don't quite agree. You can see this on the center map.
The starter package contains a large and empty 25x24 map with the players next to each other in the middle.
This one was quite hard to play well.
Later, the preliminary rankings used a small version of this map, for which my bot played many draws agains players of varying strength simply by walking opposite directions and dividing territory evenly in two. On a slightly larger map my bot chooses to diverge from the symmetric behavior, simply because there is more room to switch from the left to the right side and back.