Here are stats.
Three polls of voters. Not individuals with something to gain.
https://www.washingtonpost.com/news/the-fix/wp/2015/10/13/the-candidate-breaking-through-in-the-democratic-debate-bernie-sanders/
Hands-down was a quote
excerpt:
Bernie Sanders by all objective measures "won" the debate. Hands down. I don’t say this as a personal analysis of the debate; the very idea of "winning" a debate is silly to me. I say this because based on the only relatively objective metric we have, online polls and focus groups, he did win. And it’s not even close.
Sanders won the CNN focus group, the Fusion focus group, and the Fox News focus group; in the latter, he even converted several Hillary supporters. He won the Slate online poll, CNN/Time online poll, 9News Colorado, The Street online poll, Fox5 poll, the conservative Drudge online poll and the liberal Daily Kos online poll. There wasn’t, to this writer's knowledge, a poll he didn’t win by at least an 18-point margin. But you wouldn’t know this from reading the establishment press. The New York Times, the New Yorker, CNN, Politico, Slate, New York Magazine, and Vox all unanimously say Hillary Clinton cleaned house. What gives?