As a Red Sox fan, he needed the change of scenery. I really don't expect those numbers if he had stayed.
So far, things have worked out alright for both the Dodgers and Red Sox. (Pirates, well I'm not sure you can gauge things quite yet.
Look, I rooted for Manny and loved him as a fan for almost 8 years. Still, I can't say that i'm exactly enthusiastic about what he's doing now. Just a part of me that feels like he gave up on Boston.