I call BS on that one. The servers may be handling the inter-city calculations but that's it. There's just no way that these mini-cities have so many calculations that a decent desktop stumbles with them.
I went off the bean almost a year ago. The symptoms lasted for almost ten days, and the first four or so days were absolute HELL.
You can tune a piano, but you can't tuna fish. You can tune a filesystem, but you can't tuna fish. -- from the tunefs(8) man page