I think this is probably the first time where you can make that argument. 2012 was the last time CDM landed on a Saturday, and Avengers only dropped 18% on Sunday, but that can easily be attributed to spillover, especially since CDM happend on IW's second weekend. I guess Think Like a Man had a muted Saturday, but that was probably due to Avengers than CDM, especially since its Sunday drop was typical. Hunger Games still shot up a decent 49% on Saturday and only dropped 50% from a week ago, and had a typical Sunday drop.
I guess since CDM was on Guardians 2's opening day, that helped its Saturday to only drop 8.5%?