This is the first ever release date on GT5 that i believe as it is told by Polphony Digital and not some random guy trying to make his way up through Sony.
Official trailer from E3
http://www.youtube.com/watch?v=jmfBf_sAz5Y
Screenshots from E3
http://www.gtplanet.net/stunning-gt5...creenshots-15/
Car selection vid from E3
http://www.youtube.com/watch?v=uBqkv...1I&feature=sub
Gran Turismo 5 Day/Night Transition at Toscana
http://www.youtube.com/watch?v=A1OZCwRGFUA