Me and, uh, who was it? RyanXWing, I think, compared with Khull (a diablo player) the number of users and games on US East. Well, apparently, 10k out of 60k players were playing the game.
However, 3k out of 6k were making games
Which tell us that there are probably lots of 1v1 matches. You can go check for yourselves, it's probably quite the same, still.