> I wonder if there's a class of people who managed to get CS degrees but really aren't that good

Yes, yes, oh my god yes!

The classic one that will stick in my memory forever was the candidate with an MSCS who was given the problem description and categorized and described what class of problem it was, but completely failed to make any progress in solving it.

I'm sure she was great at complex algorithms, but we just wanted a for... loop to start with.

The flipside of this is that one of the best hires we ever made had such a bad resume that I remember storming into my boss' office and asking why I was wasting my time interviewing that person.