Actually it's closer to being the fastest, than the slowest. Nebraska and California service centers seemed to be the fastest in processing time. Also, it was the first to start approving people. California started approving days later. Because the first flow of applications are routed to Nebraska, then the second to California, and so on with Vermont and Texas. Your service center doesn't necessarily depend on where you live. It's when they receive your application and which service center is accepting most applications at the time. Many people from same states got their applications transferred to different service center, Including California, Chicago, Georgia, New York, etc etc