That Guest was me. I hope you don't think that my comments were dimmwitted, Jack, because I actually read the article. I was responding to the people in this thread who are "slagging off" pop music.

As far as the research, their observations are correct, but music is written that way on purpose, so they aren't telling anyone anything that isn't widely known already. Why is is written that way is the better question, and even that question has some pretty well established answers.