I believe that was a skeleton story about how he made money. I imagine he didnt mention a few tidbits of information like linking hs google trend post to a authority site he owns or or a high pr site in the same topic.
Plus as long as ive been developing, which is 14 years now, it is very rare you see any major response to anything that quick. I mean maybe a news site that gets picked up by google news for bunches of stories or digg etc etc etc
kinda like getting rich raising alpakas