This is why some people are annoyed. Seems porting to 360 takes longer than localisation and the PS version will get held up until its finished...
Who are they making happy with that?
My guess is 360 owners who want to play it will be quite happy, and PS3 owners who are getting slighted will still buy it, so Square doesn't really lose anything. People have been pissed at Square for delaying games before (FFXII), so it's nothing new.