So recently ive found this site.
http://gw2status.com/
It shows all the stres tests and how many servers are live as well as countdown timers for how long they last and when the game goes live.
notice anything odd?
After each beta weekend event prior to 3 there was only 1 stress test
And now there have been 10 the 10th only comming about 6 hours ago from time of this post.
And another that i was able to get into a day ago.
So what is with these random stress events, there are no emails and nothing on the official site about them yet they do happen.