The horizontal indentation on the comments might be a bit aggressive, and each comment is taking up a great deal of vertical screen real estate. Further, the clickable "more" makes reading long comment threads difficult without a great deal of scrolling.
It seems to be optimized for mobile viewing, which is good. Dobbs knows how I hate clicking tiny links with my fat fingers. But, when behind a desktop client, the CSS could be adjusted such that it takes better advantage of my screen resolution.