I don't normally post here, but I'd like to chime in here for a bit- as a college student.
I think the big reason a lot of students take "easy" classes is that they are fearful of having a low GPA, because it can ruin the odds of getting into grad school, etc. I'm currently in my 4th semester, and I will admit, aside from one Calculus class I took (and to an extent, the Intro to Chemistry course that same semester), I really haven't found any "hard" class yet. And really, the only reason that the Calc class was "difficult" was because the TA on Thursday taught/quizzed on entirely different subjects than we learned in the lectures on M/W, which killed a lot of people's grades.
I do go to a large, public, research-oriented university, and more often than not the "professor" for my class is merely a grad student, and not in just the Gen Ed courses. Every lab course I've had was taught by a TA as well. It wouldn't bug me as much if the TAs didn't seem clueless half the time or didn't seem to care.
As for the coursework- I've taken 3 Humanities classes and an Ancient Mythology class- all that were supposed to be literature based- and the worst assignment in any of them was writing a 5-6 page paper at the end of the course, which pretty much amounted to me saying that women weren't equal to men in the stuff we "read" over the course of the 6 week long class over and over and over (I ended up getting I believe a 98).
Honestly, all a lot of students here care about is maintaining a good GPA- especially if they're on a Florida Bright Futures scholarship- and graduating.
Not sure if that's a good post or not. I tried at least. Plus, if it sucked, think of it as proof that the study was right

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ETA- Something I wanted to add that I forgot.
The link has a few students that say that their first semester of college was pretty much a review of high school. I might not be the best judge of that (I graduated HS with 42 hours of college credit already, from Advanced Placement/International Baccalaureate/Dual Enrollment, and generally was in "college prep" courses) but so far a lot of my courses are reviewing what I learned in HS or at best are just expanding upon what I learned. Thinking critically so far has been a pretty foreign concept in a lot of my courses.
Okay, officially done. I think.