I'm really curious to read any discussion about this on HN, because I think the other times Eli Pariser's TED talk and book have been posted there haven't been much discussion. It's been circulating in my family (mostly by non-technical members) and there was some amount of alarm stirred up. I'm skeptical of this just because the evidence doesn't seem that damning.<p>Has anyone read the book? Is there significant evidence that this is a serious issue? I completely believe that this is beginning to happen, and would believe that FB does it since I don't spend enough time on the news feed to notice if it was happening, but the example in the TED talk and in the NYTimes column linked to by mhb is a Google search for "Egypt" earlier in the year, and two people seeing drastically different results: "Two people who each search on Google for “Egypt” may get significantly different results, based on their past clicks."<p>Aren't there other reasons for two people being served different results by Google? I've often read that they do heavy A/B style testing and stuff like that, which seems like it could explain some discrepancies.<p>So what does HN think? Is there stronger evidence here than comparing a few Google searches?