Well, yes, every time a post claims that a Trend has significance, I'll probably post a reminder that it doesn't.
Trends don't even rely on "weighting," the dishonest trick that's used in the official Book. That makes them even farther from reality than the Book itself, which is based on already-too-small samples that consistently deal with many unreturned diaries, which weighting pretends to correct.
Don't get me wrong, I'm not saying that these numbers don't cause radio employees to cheer or cry, or to experience promotions or firings, or that they don't result in significant changes in advertisers' buying habits. I'm just saying that the numbers in the Books themselves, except in very general ways over long periods of time, don't really tell us much about what listeners are doing. And Trends tell us even less.