Copy over my email comment:
Yes, interesting.
Some of them read like the student did not do much reading at all; a number echo strongly previous comments; and some put way too much stock on one post (eg. the Google one). They are overall suspiciously positive - we all should know that there is some extremely wrong or extremely unobvious or extremely unpopular positions taken on LW, so to see only positive or very luke-warm reactions...?
This is probably related to apparently you not providing any specific pointers or articles into LW. If you try it in the future, it'd be interesting to see if you get significantly better results by linking to a mix of the best and the most controversial articles, or even just a list of random articles.
The responses are almost entirely bullshit. The students want to earn the maximum amount of credit for their responses; the maximum amount of credit is small compared to the exams; they're uncertain about how their comments will be evaluated; and the context of the blog doesn't encourage them to put much thought into them. Less Wrong is presented as a homework reading and is therefore authoritative. Thinking critically about the material on Less Wrong would require too much time and effort for such a trivial assignment, and comes with the risk of falling out of favor with an instructor who might not like critical thinking.
College is weird.
Link.
Given the positive reactions, I think the professor seeded them with a positive impression of the site's content.