@HazeGrey, you are taking me way too literally! My point is that top colleges in the US have varying stress cultures and I picked some that always come up as having a high stress culture in discussion, which Brown, Stanford and Yale do not, even though I’m sure the students do work hard (Brown is on the “students study the most” Princeton list, though, which surprised me).
Though I’ve experienced the Wellesley stress culture, thus it would actually be interesting to hear those students’ input.
I’m sure maths and CS at Oxford ranks right up there on the stress scale (not a STEM person myself), but, again IME, it wasn’t the workload so much but the demands for independence which stressed the US students most, not the workload in hours, which they considered perfectly normal.
Edited to add that I can see US students mentally adding jobs, clubs and sports to the overall, stress inducing workload, whereas the UK students, particularly at Oxford or Cambridge wouldn’t, being more focused on their subject. What @Twoin18 (nope, sorry, @HazeGrey, but I’m sure Twoin18 would use the same expression) describes as the “intensity”. While many do have ECs, they appear to me to be more focused as well - you do English, focus on Elizabethan drama and are in the drama club, or music, and are in several choirs. When they do college sports, they play it as a hobby, it’s not like it’s their main job nor do they need to play in order to keep a scholarship.
Imperial, being a STEM school, may be rather more “intense” in that way. Again, it’s culture I think you need to look at, rather than ratio of waking hours. Not that she couldn’t step up, rather that she might be unhappy.