Music is in the person, some people have the abiltity to learn quickly. However, with this particular person, how well does he read? Can he sight-read? I do not believe what he says, Dream...you sound intimadated by him--DON'T be. People who sit at the piano and stare at pieces like the Fantasie-improvtu for a year, can play them and probably convincingly. But, how have they grown musically? How has what they've done helped them? Besides giving them a peice to show off. A serious musican learns music, and studies it. Not the notes, and the "show-offy" speed. Ever heard the story abotu the truck driver who crashed his car? Just because they can play a piece like that does not mean they are good musicians, it means they imitate well, that's all. This is a kin to a kindergartener who just learned to write, trying to write a novel. They may be able to write the amount of pages for a novel....but how good would it be? Yeah it's amazing, but really means nothing in the long run. That student will never want to go backwards and learn the basics, that are fundamental.
Also, is it the case that your friend has "easy" versions of the pieces, and not realize it? :-)