I probably shouldn't be getting involved in this, but Kup, can you leave the intellectual judgement out of the conversation? I often feel like I detect this judgement from you if someone talks about not taking learning seriously (as well as in certain other areas).
We know you're bright. *I* know you're bright - I consider myself a pretty adept programmer by now, and usually am pretty well-regarded as such by friends and co-workers, but I know that you know far more than I do about a great number of things in the area. You don't go to grad school for computer science without a certain amount of intelligence, and I'm guessing you're probably considered a highly adept graduate student where computer science is considered.
That being said, if Zeus took easy classes, that was his business, and you have no call to down-talk him for his schedule choices. Did he learn less than you did in college (at least, regarding classes and study)? I have no idea, though I know I certainly didn't learn as much as you did. However, if he didn't learn as much as you, does that mean that he "should" have challenged himself more or that he wasted his time there? Not necessarily at all. There are a lot of reasons to go to college, and many people who don't kill themselves studying have profound and meaningful - or wonderful and fun - or sobering and life-changing - or any one of a thousand other adjective combinations - life experiences which almost certainly have enriched their lives. A number of people waste their time in college, too, but simply not taking strenuous classes is not a qualifier for that, in my opinion.
If your intent was solely to point out that studying needs to be active learning and that "cramming" really isn't the best example of such (though it is still a kind of "active learning"), then I apologize for scolding you. I just think "book snobbery" is a very damaging thing to inflict on people.
I'm not trying to judge you, but I do feel a need to stand up for a point of view that says book-learning isn't the only important thing in life.