I was in the thick of it, and "the hunger" had been building since Prologue's release in 2008. Every month it got worse. Since the earliest I can see that Kaz made that "We could release GT5 now" statement was June 2009, all that did was fan flames that were already burning. With nearly two years from the release of Prologue to GT5 itself, it was pretty clear that the fans would have been getting pirchforkie no matter what.
It's true. GT5P bought them a year at best, as it did with GT4 Prologue. People were going to be pushing for release regardless after that one year. Kaz made it worse, but I agree that it would have been relatively terrible regardless of anything else.
It was nearly THREE years from GT5P to GT5, December 2007 to November 2010. If you give them the benefit of the doubt and use the EU dates, March 2008 to November 2010, it's still two and a half years plus change. Way too long, in anyone's book.
------------
Comment on GT7 in general:
I think PD could do well to look at seriously adopting a base game + expansions model if they intend to keep doing this. Sell a base game with limited content at a cheap price. Sell an expansion for that each year, for a cheap price. Continue for entire console cycle, releasing cut price bundles as necessary later in the generation to let people buy in for a reasonable price. MMOs tend to do this, or did back when I played them, and I think it could work well for a game like GT.
They've already sort of got the framework in place with the concept of Spec updates, they'd just need to start charging for them.
It would seem to suit their development style, and I think would be more pleasing to the customers. If major updates are paid then there's incentive for Sony/PD to advertise and inform the customer base. And each Spec update would be complete as released, so no whinging about promises pending or not kept. If they're going to do the small-chunks-regularly-released style of game release, they might as well embrace the concept wholly.