From what I've heard Eternal Sonata is only timed exclusive and will hit the PS3 and no that has nothing to do with the ESRB rating. I've heard it from someone who works for Playstation. Though if he was just joking at me or telling the truth, I can't really judge about that.
PLAYSTATION®3 is the future.....NOW.......B_E_L_I_E_V_E
Supporter of PlayStation and Nintendo