Lag is far and away the biggest issue on the TTR. Hortus indicated that one of the main functions of the TTR is measuring the best way to handle the massive number of contenders on the official tournament server. Blizzard currently has no plans for opening up any new TTRs to relive the stress. Logging into the server, I find the term "laggy" to be an understatement. Movement is dizzying, and players crowd around.