Via Slashgear:
This afternoon servers are in short supply for the Titanfall Beta, owing to a bug rather than to a final limitation for the game. According to Respawn Entertainment developerJon Shiring, Microsoft is both aware of the bug and is working on a fix right this minute. You'll encounter this situation in gameplay when you see the message "no servers found."
The bug is not limited to the Xbox One as, again confirmed by Shiring, "all servers on all platforms are on Microsoft's Azure platform." While we do not have an ETA for when the issue will be fixed, it does seem as though it's not a complete break-down: some users appear to still be able to jump in on games.
That was from 2/14. I'm not surprised. Same old song.
I assume that the servers are down because all the #Titanfall significant others found a way to break the servers for V-day! Bravo.
— Vince Zampella (@VinceZampella) February 15, 2014Valentine's Day hour 21: The only thing that went down on me were the Titanfall servers. #gamerprobs
— MrBio - #Vices (@MrBio_Vc) February 15, 2014