Well I don't know the guts of Stanford's CS program either, but the term 'introductory computer science class', particularly pluralized, could easily be a course of the form 'Introduction to X' where X is some broad CS speciality, not necessarily a programming one. It could be Introduction to HCI, Artificial Intelligence, Complexity Theory, whatever...
And of course, if she had no programming ability beforehand, the fact she overcame your hypothetical hurdle to be able to put 'Software Engineer of <famous silicon valley company>' on her resume suggests she's not in the class of programming-incapables to be completely written off.
And of course, if she had no programming ability beforehand, the fact she overcame your hypothetical hurdle to be able to put 'Software Engineer of <famous silicon valley company>' on her resume suggests she's not in the class of programming-incapables to be completely written off.