Default matchmaking will often do that so you get less lag against your opponents and the game runs smoother in general. So in those games you wouldnt play against other countries by accident unless you specifically chose to open your search criteria. Lag aside I really like playing with or against people from other parts of the world. But if you party up with a friend you will always be able to play on the same team whatever game, but the one who is not from the country where the game is being hosted might be at a slight disadvantage.
