I think that "wipes out" here is referring to the lead that Trump had in the polls previously. All the states went from a clear lead for Trump over Biden, to basically even, with one exception showing a clear lead.
I think that it suggests a competitive race, rather than one side coasting to victory. It is hard to draw concrete conclusions still, but the clear lead is definitely gone
Yeah. Like everyone is saying it's dangerous to infer a democrat win on the back of this polling... but I think we can conclude that swing states have responded favourably to swapping her in.
Just 10 days ago people were saying it's too late to trade horses because no one knows her so we're stuck with Biden. These polls thoroughly demonstrate that assertion was incorrect.