badman's Beta Blog has word on plans for an account reset in the Enemy Territory: QUAKE Wars demo, saying they are looking to stress the backend infrastructure for account registration and their ability to roll back statistics:

The wipe is currently scheduled for this coming Wednesday (August 22, 2007), at which point you will no longer be able to play unless you re-create your account in the manner described above. The statistics are also going to be reset that day.

The other test we’re running is currently taking place on a much smaller scale and concerns the statistics roll-back and restoration functionality. In the final game, we’ll be able to use this to combat statistics exploits, padding, and other unwanted activity. To make sure that rolling back and restoring statistics on a large scale is as seamless and robust a process as it can be, 5000 beta accounts have been randomly selected for this test and their owners have already been notified. Essentially, we’re be rolling back the statistics for those accounts by several hours, followed by returning them to their original, pre-rollback state. We’re taking great care during this process, but since this is still a beta, there is a chance that the statistics may be corrupted during the test.