reactions from Polish members?
Yes the NYT is an objectively terrible newspaper and reading it for information is not a good idea....
From my viewpoint in terms of numberrs it seems a lot like late 2019 before the pandemic I hear lots of russian/Ukrainian on the street and in public transport and in stores (among both customers and staff).
Numbers are definitely down from last March-June or so
Not certain why the NYT thinks teachers need 're-training'....
Ukrainian (which they've all had in school even if they mostly speak russian) is so close to Polish that children achieve fluency very quickly and AFAIK there have been no calls for Ukrainian or russian language education for them.
The historical animosity is mostly a polonia and/or far right concern at present. It's not something that the overwhelming majority of Polish people think of often.
Polls among migrants are notoriously unreliable and whether a person stays longer or returns home is subject to a lot of different factors. Many are staying for the time being and we'll see what happens after the russians are chased from Ukrainian lands.
I wouldn't be surprised if there's a bunch of Polish people who go to Ukraine then to take part in rebuilding opportunities....