I'm not sure they can afford any. Christmas will be a prime time for them, and the focus will very much be on the PS4 as we go into next year so they'll want to get it out sooner rather than later.
GT5 is the only game in the series I haven't bought, it just seemed very underwhelming and the inclusion of all those car models from the PSP and PS2 versions of GT games really disappointed me. It'd be great if they could go back and improve the quality of those for GT6. GT has always been about the sheer variety of cars (even if many of them are just different versions of the same model) but I think most people would rather have a couple of good looking Skylines than 23 low-poly ones.