Kazunori Yamauchi has confirmed a patch is due for release for GT5 this Saturday, 27th November in an interview with Eurogamer. While the full details of the patch are not known as yet he did comment on feedback from GT5 fans who want more restrictions for online racing. He had this to say about online improvements:
Eurogamer gave GT5 a 9/10 score in their review which you can read here.
We also received a lot of demands for having more regulations placed on the online play. We're going to perform an update on the 27th that will include things like max power restrictions and weight restrictions. It's like a living creature, dynamically growing as we speak.
Eurogamer gave GT5 a 9/10 score in their review which you can read here.