I'm biased in some ways as someone with a philosophy degree, but I've easily run rings around CS grads, and seen some who have absolutely no capacity to program. Most of the non-cs programmers have A degree, just not a CS degree. Often technical, I've known chemistry degree, engineering, architecture.

I think you're right in guessing that it's your culture pushing out the good non-CS grads rather than they're better. Be interesting to hear if you do the typical American white-boarding algo nonsense that YAGNI.

This generation might be different as CS became an obvious choice for the sort of people that may previously have chosen a wider range of subject. I think it's a shame as ultimately I see a CS degree as a waste of time, I've studied the concepts myself thinking myself deficient and never actually found any value to the lessons apart from intellectual curiosity.