IMHO, the way to define boomers is if whether they were of draftable age for Vietnam. That's the definiing moment of that generation, like it or not.
As for this:
This month, a new book, "Kill Your Idols," features essays in which rock critics who are young boomers and Generation Xers tear down allegedly classic boomer albums such as "Tommy" by The Who, released in 1969, and "Pet Sounds" by the Beach Boys, out in 1966.
As if THEY have any good music.........LOL.