Regarding the link to the article, I agree that it’s easier to get an interview for a first job if you’ve gone to a name school. But after that it’s your skills and experience that matter, not your school.
The professor who wrote the article suffers from the same problem that many academics suffer from, which is to assume that what’s important in academe, such as school prestige, is also important in the business world. It’s not, especially in tech. He’s only been an intern at a few companies, which doesn’t afford the time to really understand how business operates, including hiring. As he even admits, most of his arguments are based on things that his friends have told him rather than direct experience.