I noticed that too, he says he eats that now. My guess is that it's dumb luck he got into the shape he's in, and now he's a little more aware of his nutritional needs.
He has good arms, but as previously mentioned his chest is pitiful. If he wasn't so into isolation work, he'd probably have a decent chest and decent arms. Also, can't see his legs.
But he's after looks not strength, so...