In fact the highest rating before this one was for Dissidia, which got 10/9/9/8. Any score that receives a 35 or above is good enough to get Famitsu's "Platinum Prize" (32-34 gets a "Gold Prize") So yes, this is an excellent score for a PSP game.
edit: I really ought to say for ANY game. It's still above a 9/10.
edit: I really ought to say for ANY game. It's still above a 9/10.