Bit of an overstatement - aren't these the narrowest 'who won?' polls of any of the debates? The main positive for Hillary is that Trump won't have made inroads with undecideds and swing voters from this, which is of course his only chance of victory.
Hillary has won all three debates by 10+ points. Isn't that unprecedented? This is good news no matter how you spin it.
Gallup says Bill Clinton won both debates in 96 by 30 points and 35 points. Kerry won by 32, 15, and 14. Obama 08 won by 12, 33, and 26.