Well been running on the US server with the load balance option set since about 7am PST this morning and it seems to be leveling out I started the morning running around 1.78KH/s and over the last couple of hours its been stable at 2.1KH/s still down from what I normally run at around 2.4 - 2.5KH/s but my unexchanged and my balance amounts are going up like they were when I was only mining on the EU server.
My rejects seem to be down as well.
Currently running non modified cgminer 3.1
Windows or linux? And what is your ping to the US server?
I have 1 Windows box and 2 Linux boxes currently and I am not at home so I can not give you 100% what my ping to the US server is Ill gladly post it when I get home this even around 6pm PST.