Exact oppositei'd been connected and had fast ISP with O2 for several years but when sky bought up O2's ISP the speed seemed to drop to about 8mb/sec. Something of the same size would take about half that time to download on my PC.
It does that for every game such as Madden, It´s not the console, it´s the speed your ISP is providing.
to the PS4, PC, or even in some cases the 360, the Xbone does installs/updates slow.
This is all while streaming Netflix, HBOGO, You Tube, ect...
Maybe check with your ISP, I had to check with mine about fixing my speeds a few months ago.
Why does my xbox one always take 18 to 24 hours easily to download big game, (for ex. At my home and at my business the speed I pay is the same, it takes around an hour to download 1 GB; if I want faster connection I have to pay my ISP more.