Sony's Computer Entertainment America has made an announcement via twitter the release of Gran Turismo 5's first DLC pack has been delayed in North America until the 25th of October no further explanation has been offered, but has said it will include a special bonus when it is eventually released next week
Update: GT5 DLC will hit the North American Store on 10/25 but will include a
special bonus. Apologies for the inconvenience!
DLC is presumably still on schedule to be available to the rest of world on Tuesday 18th October at 07:00 UTC (convert this to your local time zone here), according to another tweet from Kazunori Yamauchi earlier today.
Source GT Planet
Update: Bonus Content Revealed
We are confirming that the Gran Turismo 5 DLC update will be available to download on 10/25. We apologize for the delay in the content however as a gift to our eager fans we are offering free bonus content. For those who purchase the “Complete Pack” by November 7, we will throw in a unique GT Academy dynamic theme as well the Honda NSX GT500 Stealth Model. Just to be clear, both the dynamic theme and the car are free with purchase of the Complete Pack. Again we are sorry for the delay and hope that fans will enjoy all of the fantastic new content to come for GT5.
Source GT Planet