Most of it is bland grist and filler that elaborates and associates adjacent words to create a "cold reading". There is the occasional "spot-on" moment, barely above chance, that seems significant mainly because you never though of it before. And an equal crop of the apocryphal and dangerously wrong. That's worrying because unless examined and corrected this stuff will spread like weeds.
When it comes to song lyrics there's plenty pure nonsense, and words the writer by their own admission claim not to have any significance. I wonder how the algorithm would fare with the "Ning Nang Nong" by Spike Milligan, or something subtle but exquisitely ambiguous like Bowie's "Bewlay Brothers"?