The plan was for Gran Turismo 6 to be official unveiled later today with a wealth of information. As it turns out iafrica.com didn't get the memo, or simply refused to adhere to the embargo.
They have quotes from a press release we have yet to see:
"GT6 for PlayStation 3 will bring new levels of authenticity to 'the Real Driving Simulator' as well as introducing stunning new tracks and cars and a revised user interface."
"A new compact game engine will improve operation and increase the flexibility to expand it with downloadable content."
All the cars and tracks from Gran Turismo 5 will return.
The game was unveiled at a press event at Silverstone, and rumours are also stating the game will be released on PS Vita alongside PS3.