For a long time I’ve read that there is a difference in how search engines see and index filenames and URLs that contain dashes or underscores. For a long time the general concensus has been that the search engines consider a dash to be simliar to a space, whereas they consider an underscore as no space. If that’s true, then your new page called will_hanke_wins_lottery.htm is going to rank as willhankewinslottery. Had you named it will-hanke-wins-lottery.htm then you’d theoretically have a better chance at ranking for a mixture of those individual words.

But c’mon, do you really believe that with all those algorithm nerds in California can’t figure out how to differentiate between a dash and an underscore?