Things like this really bug me. It is really just an excuse for the author to show off his supposed musical knowledge and sophistication, and what it really boils down to is that he misses that feeling of superiority over everyone who walks in his store. While he is correct that all popular music is over-rated in one way or another, how could artists as prolific and important as Bob Dylan and the Beatles ever truly be over-rated? Their respective impacts on popular music and, by extension, the
world, are inestimable. More importantly, millions upon millions of people have been deeply moved or affected by their music. In the end, that is what is truly important. If the music, no matter how derivative, base, unoriginal, manufactured, or just plain catchy, speaks to you, then that is good music.
That all being said, I have to agree that U2 is one of the most over-rated bands in the world.

Yeah, I have and listen to the greatest hits, but their live shows are astronomically expensive and "Vertigo"? - come on, that was horrible.