I think the uncertainty of not knowing what exactly will be tested on or what particular professors will be grading on makes it hard. The workload itself for the most part hasn't seemed too tough for me as a 1L thus far (with some times of exceptions, especially when the legal writing and research assignments coincided with the other class assignments). Next semester I have more credits so I think the workload will be a bit more intense, but then I will also be somewhat more adjusted to law school.
I think I know where Desert Fox is coming from re: it not making a lot of sense to spend tons of time working on law school materials (I think that's what was meant by working 60+ hours- that it was a reference to someone who indicates that between class hours and study that is how much time they spend). There definitely seems to be a law of diminishing returns with studying, and it really isn't about knowing or memorizing all the details as much as about making good applications in the exams from what I can tell and have experienced. However, I think studying really hard (spending a lot of time doing it) can help, and if someone takes a lot of their time studying (perhaps considerably more than minimally necessary) I don't feel I'm in a position to say that categorically they are lying to say they do so or that they would be better off studying less (though it could be the case I think).
If the working 60 hours + reference was suggesting there are some people who say they are working that much outside of law school then the above analysis doesn't apply and I agree with the statement more fully, with the exception that in general if something is working for someone else (I don't see how that would or could) I am still not in a position to categorically judge the soundness of that approach.