There is self selection going on in the comments of just about every article. In general people with strong feelings are more likely to comment, and on the internet strong negative feelings seem to be more common (and especially in an article about failing institutions).

In this case, people that hated going to college (or hated the idea of going) are more likely to comment. People that were pleased with their experience probably don't care as much about the article so they either don't comment or don't read it at all.