Back when I was doing a lot of brochure sites I often thought that there was a correlation between the quality of content and the amount of filler -- big text sizes, lots of graphics.

If I have a lot of meaningful content, say essays of 5,000 - 10,000 words or novella-length fiction, a 20px+ is going to make the page-length ridiculous. But sure, if you can only be bothered to churn out 100 words of copy and you want your page to not look like a content-desert then 20px+ font and giant margins are your friend.