I do like Lessig's point that "Zuck's a genius, but so are many". There's a lot of insecurity around places like HN where people go, "baw, Zuck can't be a genius, because then not only would he be wealthier and more famous than me, but he'd also be more capable!" The "who's smarter?" argument is really a waste of time. It's highly likely that Zuck is an absurdly strong engineer. But, so are many others, possibly you included. Build until you hit your natural limits; before that, no one has any idea how "smart" you are, yourself included. Find your own market to win instead of taking the respect and credit away from him.

As for his hacking abilities, I've heard stories that he's not (or is no longer) among the best; perhaps he's better at coming up with creative uses for a system than actual coding. And for what it's worth, I don't think the movie made him out to be a "genius hacker" in the coding sense -- more a genius hacker of what the Internet was intended to be.