I already did few times and the effect was as you describe. Funnily enough, it’s not even any tankie lore, even their beloved wiki mentions that.
Was it some online squabble? I can’t imagine anyone reacting much to it irl since most agree the stuff is exaggerated. It’s a sore point or anything.
Anticoms in Poland do mention Hayha a lot irl too if the talk goes anywhere near the topic.
Like people enthusiastic about Finland or Finns? Because I wouldn’t be surprised by the reaction from first group, whereas I’d be really surprised by the latter. I have some of the flag waving, Finnish lion wearing nationalistic friends and when we talked about it some time ago everyone agreed that the number is exaggerated and the discussion was more about by how much. I think some thought it was still really high and some were just unsure. Of course this is just my experience. Abroad those people might be more boastful hah