I am one of those that voted for: I really don't feel that he owes us anything and I understand why he hasn't said or written anything about Heath's passing.
I have mostly tried to stay out of the discussion, but since nova asked for some clarification... For me, when it comes to death and grieving, I feel that often, there is no understanding. No understanding the how or the why, the emotions, the circumstances, therefore, while I don't know how or why or what is going through Jake's mind, I say that I understand it, because to me, all things come with grief: the good, bad, the ugly, and outbursts as well as silence. Someone going through the most normal behaviors on the outside could be experiencing the most intense grief on the inside. So regardless of whether it's screaming or withdrawing, or 'acting like everything is normal,' I say that I understand.
Hope that makes some sense and helps to clarify. In a way, it is the lack of understanding that makes it understandable.