I saw that and laughed - thanks, science, for proving what we already knew!

I have my theories about why, too - it's easier to get a record produced and recorded, now, and the music business benefits most from just churning out repetitive pop that takes very little time to produce. Innovation can't be done quickly, so that's what we're hearing, and it's influencing amateur musicians because we're drowning in it. You play what you hear, and the more people's ears are saturated with uncomplicated pop, the more we like it, and the more it influences our tastes.