I see where you come from, the "recent years" bit can give off that vibe, although that would bring up the question for how long Square already has access to hardware for the next gen-systems, which I reckon they could not have had earlier than 2012. Don't forget that the Osaka team was also busy with developing Dream Drop Distance while Tokyo is still tied up mostly with FF XV, so any development done on KH III can be only between six and eight months I'd say.
Good point. Thats an impressive 6-8 months. I guess it does justice to the new gen hardware.