I've been working on ranking a site for a keyword that a page on Wikipedia ranks number 1 for. they've been number one for as long as I have been checking (few years) and their "links to the page" count was sitting at about 175 for that entire time. as we acquired links we moved up in the results, all the way to #2. as our link count started to get close to Wikipedia's link count, their link count started to grow, for the first time since I have been paying attention, from 175 page links to over 300 in the matter of a week or so, just as we started to get close to them in link count, after a steady link count for 2 years that I know of.
Could it be that they are actively trying to compete for top spots? I can't imagine that being the case, what say you?