Of course slow, shitty web sites also cause a massive drop in clicks, as soon as an alternative to clicking emerges. It's just like on HN, if I see an interesting title and want to know what the article is about, I can wince and click the article link, but it's much faster and easier to click the HN comments link and infer the info I want from the comments. That difference is almost entirely from the crappy overdesig…
I do the same thing, but it's not because of format. To me, blogs and other articles feel like sales pitches, whereas comments are full of raw emotion and seem more honest. I end up seeking out discussions over buttoned up long-form articles. This is not strictly logical but I have a feeling I'm not alone.
Often the title sort of explains the whole topic (ie lack of parking in NY, or astronomers found the biggest quasar yet), then folks chirp in with their experiences and insight which are sometimes pretty wild.