There is a FIX to the XCOM region locking for those who want to play more ranked games. See the details here:

http://forums.2kgames.com/showthread.php?181606-FIX-for-Multiplayer-region-blockade-working-and-safe

We recommend everyone swaps to the US in this way so there is one single place for the multiplayer community.

Edit: After further study by Skan it has been determined that the US also has region locks, and that Dallas is the best place to set your location to so you cover the whole country.