Ah yes I remember that poll from January. That poll was done “online”, so we don’t know how the people were selected. We do know that they only polled “Registered Democrats” and there weren’t that many people polled.
For example, in the Primary poll there were only 404 people counted, and the base was skewed female (61%) and 67% were older (>50).
There seemed to a big difference percentage wise, but in reality 192 people voted for Biden and 118 voted for Bernie. And 94 people voted for Oprah Winfrey. So really, this is a bullshit poll.
Obviously, in an actual Primary, where you had Independent voters voting, and young people, and some new voters, Bernie would do much better.
You can see the actual results here: