A little unfair. When pressed for an answer I'm sure all he does is give the best answer he can based on current project plans. As always in software development, things don't always pan out.
With GT7, if the Amar rumour on here a while back is to be believed the GT6 project was initially a ps4 project, so it is possible all the new physics engine and lighting model etc. has been designed to be portable to the pS4. It is even possible they have been developing code and assets alongside the PS3 GT6 project for GT7 on PS4, this would mean say, late 2014 isn't completely out of the question.