Cashworks, Turbine, the new fast respawn Dustbowl, and the second 2Fort instant respawn server are all on a box based in Seattle. The rest of our servers reside in Dallas.
While it's not always true due to the way some ISPs route their traffic, the general rule of thumb is that the closer you are to the server geographicaly, the better your ping will be.
As for Arena, it just wasn't performing as desired. When we got the new box in Seattle we decided to give Arena another chance, but it did not perform up to our expectations. With the recent shuffling of servers, we're hoping that Cashworks will perform better.
Oh, and Gravelpit has been moved to the Dallas box, which makes me happy. I get 40ms - 50ms pings on the Dallas boxes instead of the 100ms - 110ms pings I get on the Seattle servers. 100ms is still very playable, but I like the best advantage I can get.
