"For example, one of the respondents Katrina, 27 from Brighton, is a classical musician and leads a jazz band. She was asked to make contact with a Japanese jazz singer, Natsuo Murakami, halfway across the world. She contacted her record producer in Berlin via an email. He called his opposite number in Tokyo who had a register of all jazz singers in the country. Therefore making the link from Katrina to Natsuo in three personal steps."
Whether or not their conclusion is valid, that is a terrible example for making their case. I wonder how many steps it would have taken her to reach a 72 year old male working in a cattle processing plant in Arkansas. I suspect her record producer wouldn't be able to help her with that one.