That does sound terrible, till you consider that the odds are very low that there are a lot of clicks from your college, unless your site is related to that college.
Then there's the question of whether your college uses public or priave IPs (or a combination). Most of the one's that I've been to only use private IPs for wireless routers.
At least from where I'm sitting, Google is having some pretty serious server problems today. Lots of blank pages coming up, both through search and on the AdSense site.