I mean, a sample of 8 is not really a sample, but I can see it being true for some undecided voters if those voters are savvy to know a lie when they see one (plus not everyone cares about the age narrative).
That said, how is anyone undecided at this point? I wouldn't exactly trust them to breathe and walk at the same time, let alone vote informed.
Doom and gloom aside, we're still a few months out so things happening now aren't going to make a huge difference. I just wish this wasn't all up to indecisive people in indecisive states...