Today he is the talk of Tokyo, Wall Street and the City. Fund managers, CEOs and analysts are poring over his report, How Teenagers Consume Media, which he wrote last week while on work experience at Morgan Stanley.

In it he laid out the world according to the teenager: a confusing place where the PC is a radio, the games console is a telephone, the mobile telephone is a stereo and text-message machine, the DVDs are pirate copies and no one uses Twitter.

Teenagers do not listen to the radio, he wrote, preferring online streaming sites, nor do they ever buy music. Games consoles “now… connect to the internet, voice chat is possible between users… one can speak for free over the console so a teenager would be unwilling to use a phone,” he wrote.

He told The Times that at home he usually communicates with his male friends while blowing up terrorists on the action game Call of Duty. “You use a mobile phone if you want to talk to girls,” he said, as “only about one in fifty girls plays computer games.”

Girls are a lot more prone to spend their time on social networking sites. Matthew uses Facebook but his accounts with Piczo and Bebo have lapsed and Twitter is strictly for the elderly. “It’s aimed at adults,” he said. “Stephen Fry is not particularly cool. Also, for the cost of one tweet you could send quite a few text messages.” As no teenagers followed each other’s profiles, tweeting was “pointless”.

He believes cost is a critical factor in the teenage market as “no one has any money”. “Eight out of ten teenagers don’t buy music,” he said. “It comes from limewire, blogs or torrents.” Meanwhile, pirated DVDs generally cost £2 and go on sale even as the films are in the cinema.

The entire article can be found on TimesOnline.