
It seems the Gran Turismo 5 servers are getting hammered. Which was to be expected. Rumors floating around state there will be a patch arriving on Saturday.
If you are having issues playing the game offline, you need to disable your internet connection.
The following are procedures for preventing the PS3 from accessing the network when playing GT5.
Please note the steps introduced here are only temporary procedures you can take until the network conditions are improved.
(1) If GT5 is currently running, please quit the game.
(2) Go to [Settings] -> [Network Connections] -> [Internet Connection] and switch the selection to [Disabled]
(3) Start GT5."

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