Sorry, I was replying to the comments to the tail end of this thread regarding Acrobat Pro.
My version of 10.1.10 Reader scrolled a little chunky but not bad at Retina (2880x1800) resolution, definitely better than the prior version of Acrobat Pro. I just downloaded the 11.0.07 version of Reader and am scrolling quite smoothly at the same resolution.
What is counter-intuitive is when I lowered my resolution to 1920x1400 (the "More Space" option in the Displays pref panel) the scrolling was worse, chunky. Not as bad as the prior versions of Acrobat Pro. I can also say that the larger I stretched the window the worse it got. If I kept the window at about one third/one fourth of the screen width it scrolled a lot smoother.
I'm on a mid-2012 Macbook Pro, testing on a 13 page document consisting of page scans.