Originally Posted by
St0rmchild
Because everyone equates geographically central with being network central -- and that's not true.
They could have stuck the servers somewhere in the middle of the country, but if that location has insufficient network connectivity, they would be in a physically central location, but still on the edge of the network.
California has a ton of backbone connections (not least thanks to all the big names in internet being there and wanting the best links to/from their HQ locations) both domestic and foreign (a lot of transoceanic cables come ashore there) so even though it's not geographicallycentral, it's probably closer to the network center.