Wow, this is the first time I've seen absolutely terrible lag in any of the beta events. 5-10 seconds to use a skill, constantly getting rolled back 15 seconds. Doesn't seem I can play much.
Posted on the front page of the Guild Wars 2 forums:
About Lag and Latency Issues
We’re having an issue with one of the Internet connections in our North American data center. Anyone connecting to us through that link is experiencing bad lag right now. Our network operations team is working to get it resolved.
Please read this thread to learn how you can help us track this issue.
and
If you are experiencing high latency or lag, we would like you to email us at [email protected] with a diagnostic file from your copy of Guild Wars 2.
Here’s how you get the diagnostic file:
Go to your desktop shortcut of Guild Wars 2*
Right click, and choose “Properties” at the bottom
In the “Target” frame (that holds the exe command) at the end of the .exe, put a space and then type -diag (with the dash) -- yours might look like this: C:\Games\Gw2Live\Gw2.exe -diag
Click your GW2 icon as if you were going to run the game
The report will be gathered — this takes a few minutes.
When all the items say complete, use CTRL-A to select “all” of the report
CTRL-C to copy it
And then open your email and insert the full file into the email and send to the address above.
To reset your account — and this is important so you can play — reopen the Properties and remove the -diag from the Target Window, close that, click the shortcut, and and play away!
*Note: If you do not use a shortcut on your desktop, please follow this step instead: Right-Click the Guild Wars 2 exe in the folder (which you would use to enter the game) and then choose “Create Shortcut.” That will make you a desktop shortcut and from there, you can follow the instructions above.