From what I can tell, there's not much evidence that this has hurt Hillary. There was a blip in the polling immediately after this came out, but subsequent polls revert back to the trend line.
That's one of the curious things about this election noted by many pollers is the volatility in the polls, likely in response to media reports about emails, ***** gate, etc. But the long-term trend has been fairly stable indicating from pretty much the beginning to today that Hillary is leading both nationally and across enough swing states to sew up the election. Nate Silver has the most cautious odds (Hillary 67%, Trump 33% approx), while most other polling aggregators give Hillary a much greater probability, as high as 80%-90% in some. Silver is the darling of poll watchers, as he nailed that 2012 election when others didn't but then he did whiff big time on Trump during the primary (until late in the process saying Trump wouldn't win), so who knows??? Personally, as I find the prospect of a narcissist utterly lacking the experience, judgement, temperament, and knowledge to lead the most influential country in the world, and one who panders to the worst elements of society, bringing the alt right, white nationalists, anti-semites, into the mainstream of American politics, and who sews mistrust about the legitimacy of America's democratic processes, to be such a horrific prospect that I take comfort in the polls, although intellectually I know there's still a chance Trump wins, and that is literally keeping me up at nights.