Well, sure. This FTC-imposed delay is standard operating procedure for almost every large tech company acquisition in the United States.<p>Some recent examples on the Google side:<p>AdMob - announced November 9th, 2009, FTC approval May 21st, 2010<p>ITA - announced July 1, 2010, FTC approval April 8th, 2011<p>AdMeld - announced June 13th, 2011, FTC approval December 2nd, 2011<p>(Each of those acquisitions were for less than Facebook's paying for Instagram, although the decision to investigate isn't just based on money.)<p>This is why large acquisitions usually include a breakup fee in case they don't go through.