The update was a surprise to me. What I've always liked about DDG is its consistency. When I search an exact phrase a second time, for the most part the same results appear. Since it's anonymous, I can presumably do the same thing from any computer. Meanwhile Google searches change drastically based on who is searching and from where. I think there was a TED talk on this about searching for "egypt" during the 2012 revolution. They found that someone who had just been googling for vacation packages got a lot different results than a guy who had searched about their politics.
This is exactly why DDG exists. I believe that this page has the ted talk that you're thinking about. The "search bubble" as they call it there has really interesting implications because it's usually 'right' for a given person, even if (because?) it does skew commentary one way or the other...