Here's what last week's British sales charts look like: Nintendo, Nintendo, EA, EA, Nintendo, Nintendo, EA, EA, EA, Nintendo.
That's what it says in the "publisher" field next to the top ten games in the UK last week. Nintendo and EA. You have to get to #12 to find a game not published by one of those two companies, and there are only 5 games in the entire top 20 that don't have "Nintendo", "EA" or "EA Sports" on the front of the box.