There isn’t a blood test that can determine if you have it. Those infected usually don’t know. Identifying Xers is also subjective, but talent coaches and scouts become pros at finding the haves and have-nots.
I believe the real music revolution began in 2001 when Steve Jobs introduced the first iPod as something neither radio nor any Walkman could accomplish.
Borrell Associates projects that figure will climb considerably over the next four years as the industry undergoes what it describes as a "great reshuffling."