I'm not sure how anyone can speak to another person's hypothetical knowledge, but my experience is that there aren't any "secrets" to computer programming. Indeed, it is a domain almost defined by openness and knowledge sharing. Some of the most complex projects (those that would arguably most benefit from such "secrets") are open source, like the linux kernel.

I find the idea that programmers are secretly hoarding special techniques to be absurd but it's quite difficult to prove a negative – especially when it's purely hypothetical.