I've never before gotten to see data like this from a popular website, so my questions might be a bit ignorant or naive. Do popular sites normally have the big

I've never before gotten to see data like this from a popular website, so my questions might be a bit ignorant or naive. Do popular sites normally have the big (daily?/weekly?) swings seen in the HN traffic data? Have you done any research correlating the high/low days versus the submissions present on those days? (i.e. are the swings content driven?)