Tier one Web sites including TheAtlantic.com, GQ.com, Newyorker.com, Economist.com and Time.com have all fallen victim to recent updates to Google's core search algorithm with their Web pages no longer featuring as prominently as the search giants' rankings, according to a Searchmetrics. The update, hinted at by key Google employees John Mueller and Gary Illyes over the past week, has led to a marked drop in the key titles' respective Web sites on Google's US search index, according to analysis from this weekend.