It's not really that significant either way. Biden is winning NH easily. It's not a swing state.
I mean, it is though.
Kerry carried the state by about 30K votes in 2012
Obama won in 2008 by about 10%.
Obama won it in 2012 by around 5%
Hillary won there by less than 3K votes in 2016.
Biden opened up a much much larger lead.
NH tends to go blue in presidential election but has had statewide wins by republicans.
NH is absolutely a swing state - its just not a Trump state.
NH is about as blue as NC is Red - which is to say you should expect Biden to win, but it will not be a state he walks away with.