Look at the company names, I'm not buying this for graduates of a 12 week bootcamp. Either this bootcamp is very selective in who they admit, or they are very selective in which salaries they show. The only way you're passing multiple rounds of interviews at google/facebook/big name sv company after 12 weeks of study is if you already had a significant knowledge base before hand, you're some kind of algorithms savant…
Three people from my bootcamp cohort ended up at Google. They had math/science background, but not CS. I know other people from my bootcamp who got to Google after year or two of working at other companies. It happens.
As for someone with a science background and no exposure to CS/programming, I'm calling bullshit.
Either they had some prior experience, or they got incredibly lucky in an interview.
I've taught in a code boot camp, and tutored in college. 12 weeks is enough time to teach a smart person how to plug libraries together to make some stuff.
12 weeks is nowhere near enough time to teach a complete novice enough CS fundamentals to pass a Google interview.