Probably for the most part true. I think since many of the younger voters aren't particularly that invested all that in politics they care more about presentation and emotion possibly, when you have Sanders who is really mostly about the economy and wallstreet, he gives them answers to the issue even if none of his ideas are going to get past. Plus, he is passionate and consistent so in style he is their "Obama" . Although, he is only Obama to a certain demo and not to the entirety of the democratic party. He is doing well in states he is expected to be good in, but it remains to be seen if he does well in states that are more racially and ideologically diverse; there's evidence that he is not.
Hillary just has a messaging problem, I believe she can sell her ideas. I don't think she should try to be too similar. What she could is better push the narrative that she is a progressive that can get things done and has a better grasp on the situation to tackle it without sounding arrogant, and she should run more issues that matter most young voters. Which would be income equality, climate change, college debt, etc . Some things like equal pay, abortion, foreign policy is something I doubt the young white voters care about.
I think it is true that young voters necessarily don't care about wealth distribution in itself, but they support whatever ideas that help benefit them from what I know young white voters are almost as conservative as their parents were. Bernie most likely has many young voters that are almost likely single issue voters .