I wish Gabriel had inserted a map of where the screenshots were taken. My hunch, which could be wrong, is that magic keywords are geographic too. In a state like NH which leans strongly, maybe the algorithm automatically identified Obama as a magic word. (This hunch is based based simply on ddg being not-quite-mainstream, so maybe its users are more democrat than the country?)

I think it'll be interesting to see the Google response to this. I think the most important question is whether identifying magic keywords happens automatically, or is programmer input involved?