Please see this post. They are working on the problem, if it reoccurs expect this to be priority #1. They are even working on a staurday. This is why they don't usually like to release on Friday. Frankly for the first 1-2 hours everything worked great, all the games were 3v3, hell I think I even saw a 4v4 for the first time. Connecting to people was much better/ I don't know all the specifics, but they are working on it, please be patient.
And from my understanding, they are holding off on beta 3 (balance and tournament test) as long as they can to hopefully get the net code sorted out. Doesn't do much good to run a tournament test if you can't get games bigger than 1v1.