As Metallica once said, let it be written. It’s not the students who love Radiohead that are likely to be the brainiest in their University but the kid down the hall with the Tool t-shirt and a fixation with the floor. A studypublished today reveals that a disproportionate number of members in the National Academy for Gifted and Talented Youth (a body of 120,000 students which represents the top 5% of academic achievement) list heavy metal - or “metal”, as its devotees these days know it - as their favourite kind of music.