“It would be much more interesting to see actual hiring results rather than what employers want others to think they hire based on.”
I don’t think companies can disclose such things as it would violate bunch of privacy laws. The studies on what colleges feed into which companies is done by scanning resumes on job sites and Linkedin profiles. That being said the articles are right in concluding that prestige of undergrad is not important in high tech, whether it’s here in silicon valley or Seattle or Texas.