It’s a significant reversal from recent history: President Joe Biden is struggling with young voters but performing better than most Democrats with older ones.
Even if this were an accurate take on how modern polls were conducted, teenagers not responding to the pollster doesn't equate to fewer teenagers being willing to vote for Biden. You have to have actual responses to determine that.
So until polls find a different way to poll the population, they will become more and more unreliable and inaccurate. The polls before the last two elections (2020, 2022) were way off. They’re just going to lose more and more accuracy as more and more gen z and eventually gen alpha vote.
The polls for the last four federal cycles have been statistically above average in terms of final results numbers. I don’t know where this divorced-from-reality take comes from.
Polls continue to sample at high enough volume that cell phone usage is simply making polling more expensive, not less accurate.
Fewer than 30% of teenagers are eligible to vote (significantly fewer due to registration rules) and markedly fewer vote (somewhere near 15% of eighteen-year olds meaning fewer than 5% of teenagers generally). They literally don’t matter.