This was a hoax and he's a musical genius
You can see this was a hoax from this interview on letterman: http://www.youtube.com/watch?v=97pPMzESi6s
And this is the beat he made for Pusha T and Kanye West, which is getting A LOT of praise in the hip hop community right now: http://www.youtube.com/watch?v=47uV0SgB3Kc