According to statistics that the 4As collects there were 633 reported and recorded agency reviews in 2015.  The number of reviews is pretty stable from year to year varying by only 5-10%.  However, from the late spring of 2015 to the late fall, there was a rash of very high-profile media agency reviews.  At one point the press trumpeted that as much as $30 billion was a stake.  But, by year’s end, the number of media agency reviews was about the same as 2014.  This created a lot of noise, but in the end very little signal.