Your guess as good as the rest of the world's. The bottle neck is that while the hearing is over (ie testimony wrapped up, etc) for over a month now, the USADA has not closed the hearing officially. When they do, they have 10 days to post their verdict. Until they do, Hamilton is in limbo.
My only guess ( and it's TOTAL guess) is that the panel has questions of the test processes and subsequent results and is doing their own independent examination of it. What I'm very sure of is that if this was an open and shut or ohhhhhhhh so very simple test like some have contended it is (it isn't), the verdict would have been rendered by now.