These were my results:
PS4 Internet Test: Pre DNS
Download----------Upload
18.0-------------------2.7
5.1--------------------3.2
15.7-------------------0.45
18.3-------------------3.3
15.3-------------------3.7
PS4 Internet Test: Post DNS
Download----------Upload
18.6-------------------3.4
14.1-------------------3.4
18.2-------------------3.4
13.2-------------------3.6
15.8-------------------3.3
Not too much of a change in my opinion, I would say that it didn't have much affect for me personally, but hopefully this gives some individuals greater results