Composers are influenced by all the important music in their lives - and I suppose that since radio started playing popular music, that's as likely to be The Beatles or Aphex Twin as it is to be Verdi or Ravel. They'd be strange teenagers if they didn't. But cross-pollinating happens too - Aphex Twin did more interesting things with electronic music than most trained composers, who seemed to approach samplers with undue caution and reverence in those early days.