Creating a static site at first was just a much faster and safer solution, especially as the original site did not contain anything apart from the two lines of text.
Yesterday I submitted a link (an StackOverflow question: http://news.ycombinator.com/item?id=3943556) that got 107 up-votes on HN, but the number of unique visitors went from below 5000 to 25000 (in other words, 20000 unique (based on IP) visitors clicked on my link).
if that's true then top story at the beginning of the US day could generate a lot of requests, and if the university has a plain cms that is updated once a week by the departmental secretary then it's pretty unlikely they have seen much traffic, ever.
To be honest I would be interested if pg could publish what kind of click through rate the various links generate - could even be a counter next to the story.
22,638 visits on Apr 17, 10,247 on Apr 18 (according to Google Analytics).
This one http://news.ycombinator.com/item?id=3894302 got 17,740 and 6,864 on Apr 26 and 27, respectively, from being close to the top.
Our numbers are 5k, 10k and again around 10k, so this would confirm what you're saying :)