For some reason, I don't remember this being a problem, and I was on a course for which we were advised we were expected to do at least 50 hours of study a week (unusual at university, where most other students would complain, "I have a lecture this month - I'm not ready!").
I remember reading Kahlil Gibran in the common room, and a girl came up and told me, rather graciously, "You're too intellectual for university." (I didn't really think Gibran was that intellectual.) Basically, though, I think that university is a great time for reading, if one has the will to. There may be other demands, but they are not the kind of demands that one experiences post-university, mercilessly and from all directions at once. Having said that, I was among the last in the UK to receive a student grant.
If time is limited, a few off-the-beaten-track books that demand engagement can still be deeply rewarding.