The Separation of Web Pages

Back in the 90s we visited mathematician at the Santa Fe Institute, and learned to soon to be iconic statistic that people were separated on the web by a remarkably low number of clicks.  (You can still join the SFI's complex systems course, now in progress).  At the time we hope to use this statistic for marketing connections.  Now a new study, mentioned in Mashable, says that there is a maximum of 19 clicks between pages on the Web.  Not sure how we might have used that, except for knowledgeefficiency measures,  but still interesting.