Comparing Unmediated Coverage

I wondered about whether there was more or less talking-head chatter during the Republican or Democratic conventions. Media Matters crunches the numbers so I don't have to. Yes, they have a bias, but the methodology of the study seems fairly sound. Try this: look at their data tables first (scroll down), and draw your own conclusion about (a) what those data say and (2) what those data may mean. And only then read their own summary of their data and its import: how well do your interpretations and conclusions match up? [updated to add the excericse]