Nope.
Yes it has......
Link:
http://www.develop-online.net/news/29626/Polyphony-looks-to-PC-game-development
"The game was first revealed at E3 2006 under the name Vision Gran Turismo.
In an April 2008 interview, game creator Kazunori Yamauchi revealed that 150 people had worked on Gran Turismo 5 for four years, with all of Polyphony Digital's 120 employees working on GT5, and the game costing 50 times more to develop than 1997's Gran Turismo."
Hmmm.... 2008 - 4yrs = 2004. That's black and white. By the time the EU release rolls up it will be over 6 yrs, disregarding when or what has been released in that time since. GT5 has been in development for 6yrs, conceptualized for possibly 8yrs +........
It's been in gestation for a hell of a lot longer than 2.5 - 3 yrs.
Look i'm not concerned when it's gonna be released now, i'm tired of riding the rollercoaster of innuendo and smoke & mirrors from PD and Sony.