Nope. I would elaborate, but you seem to be ignoring most of the stuff I'm saying anyway.
Kindly elaborate then if you know so much, but I know the first time I ever discussed this with you, you were actually surprised to find out that Prologue ran at 1280x1080.
Look at the facts, GTHD was released December 2006, it ran at 1440x1080 60fps with no AA, it had 5 cars, one track, time trial and drifting only, you only ever had 1 car on the track. It was a move to give you GT4 in HD and was to be a PSN only game based on micro-transactions, so 50p for a car, 1 quid for a track. Soon after the whole concept was ditched to develop a full GT - GT5.
One year later, in December 2007, Prologue was released in Japan with 5 tracks, and 40 cars, still based on the GT4 driving and physics engine, now at 1280x1080 60fps and 2xAA. A year later it had 80 cars, all of them premium model, yet still running on the GT4 engine.
Two further years later, they released a time trial with the GT5 driving model.
In the meantime GT PSP has been released.
Another year later the full GT5 with 250 cars, totally redone graphics engine with daytime transitions, totally new physics and driving model, probably dynamic weather, and a full online mode.
Development of GT5 started in early 2007, I would call GT4 with 5 cars an one track pre-production. Please provide your inside knowledge on the matter that is contrary to those FACHTS.