Not every programmer is a rock star ninja. Most are mediocre. Some are pretty bad but know the theory and can play the resume game, pass the whiteboard test, etc. There are plenty of books and lots of advice that will teach you how to fake your way through a resume, cover letter, and interviews.
Worked at Google/Facebook/Twitter? Great. Odds are I can't afford to hire you. You're not the target of open-source filtering :)