If I use Quick Join it cycles through 5 servers in less than a second and tells me there’s no applicable game. So I go to the server list and click to join a game from there and this is what I get on every game.
http://i.imgur.com/HHp8nbz.jpg
My internet connection is working just fine. As well as general web browsing I’ve been playing EVE Online, GW2, Insurgency and Heroes & Generals (all of which are online only games) without a single problem. Latency in all is around the 15-25ms mark. It’s only Dirty Bomb that is having a problem.