It is a much higher number than it used it to be, but it's still small. On Tich and Azuremyst I've seen a surprising number around in the last couple months. It's gotten a lot of press on the forums, people talk about it a lot now, and Blizzard has officially sanctioned it. So it's kind of inevitable really. Also, for various reasons, most of the new groups are identical class/race, so its' more obvious.