This is first footages of the game. Real gameplay of the current state of the engine (probably month/s old)Now swinging this discussion into another direction could the slight hitching when going through the portals in Ratchet be a sign that Sony didn't over engineer there SSD and that they are going to need every bit of performance it can deliver?
Optimization is done later in the development life cycle. I'm amazed it ran so well to be honest considering what it was doing.