Harvard's graduation rate is 97.5%. Yale 97%. Princeton 96.9%. It's hard to flunk out of the Ivy League. Non Ivy League highly selective schools: Caltech 92.3%. Stanford 93%. MIT 92.2%. UC Berkeley: 90.9%. Low 90% success rate is normal there.
But I dont actually know what goes on in ivy and off ivy league elite schools.
Also consider that these may just be better run schools which also provide more and more useful assistance to students.
Edit: I would like to add I think this article title is extremely clickbaity, and plays on the recently resurgent class warfare phenomenon. It pains me that articles like this, from sources like this, are becoming normalized and even acceptable on HN. There's no merit to this biased pile of shit. And I'm not an ivy league graduate having a security crisis. Journalism should be objective.