Just for another data point, I double majored in English Literature and Mathematics with a CS emphasis, and I did have to work harder to get a lower grade in th

Just for another data point, I double majored in English Literature and Mathematics with a CS emphasis, and I did have to work harder to get a lower grade in the advanced math and CS classes. Just to be clear, I do consider humanities to be an excellent subject for study, and philosophy and literature, when studied with integrity, are rigorous fields. There's also, of course, a chance that I'm just naturally a bit stronger at humanities and weaker at math, and I suppose it might be the opposite for you. I did have to work meaningfully for my "A"s in humanities, but I had to struggle hard for my B+ in real analysis. Also, I do recognize you mentioned CS, not upper division math, but lower division data structures and algorithms pushed me pretty hard. And the course I saw my friends go through at Berkeley looked insanely difficult.