Malcolm Gladwell recently gave a lecture on ‘prodigies and late bloomers in art’ which has been audio archived on The New Yorker website.
The lecture is an engaging tour through the lives of some famous late-starting artists and musings on what contributed to their latent talent, including painter Paul Cézanne and legendary rock-and-roll band Fleetwood Mac!
Be warned, however, the site is very fond of annoying pop-up windows.
Link to Gladwell audio lecture.