I find it interesting that you're only actually disagreeing with the last and most trivial claim. (Well, except "College is weird", which I personally don't agree with - all life is like this in my experience.)
Well, I'll quibble with this claim as well:
Less Wrong is presented as a homework reading and is therefore authoritative.
I have been given homework reading (in a history class, and a class typically taken just to fulfill requirements, no less) that was not intended by the professor to be reliable, and I would expect that to be especially common in philosophy classes. Of course, I could just be wrong about that, and it may actually be rare; and regardless of whether I'm correct, the students may be new and still thinking of homework reading in general a...
Link.
Given the positive reactions, I think the professor seeded them with a positive impression of the site's content.