percentages - 11:27 pm on May 18, 2003 (gmt 0)

I believe the data center you get is based upon load balancing. That is a piece of hardware that attempts to distribute the load evenly across numerous servers. In addition if one server goes down there is a fail over device that automatically sends the request to a different machine.

I also believe Google has a feature which keeps you on the same server for 15 minutes once connected....although I have either seen results to the contrary or 15 minutes has passed faster than I thought!