Canadian server is currently handling all the US traffic. It has proven itself very efficient and its reject ratio are very low for all American miners regardless of west/east location. Even users from west states are having lower rejects and higher accepted hashrate here than they were having using San Francisco server.

This is why I didn't bring back the old servers. There are still there standing as reserve in case any issues happen, but for now we don't use them. I will be deciding about infrastructure changes later this week including probably changing European server to a different one, possibly relaunching Asia server, and deciding what should be the final setup for North America.