I know it's hyperbole and I'm being nit-picky but come on, 100x? 10x already sounds a bit like exaggeration, but implying there's an engineer out there who can do the same amount of work in 3-4 days as a normal engineer in a year is too much lol.
I can think of an example, though even this is somewhat of astretch: Suppose person A takes 40 hours to write C code to manipulate a large data set. Person B puts the data in a database and is able to write commands, which only take 10 minutes, to achieve roughly the same thing.
Person A should've considered alternatives and asked around before spending a week on that manipulation lol.