After waiting for a long time to replace my 2012 Macbook Air (i7), I got the new Retina Macbook (m7). And for the first time I am thinking of returning an Apple product. The screen is great and I think I can get used to the keyboard (not a big fan, though). But my main usage is to read medium sized PDFs (around 30 pages), and the scrolling performance is just horrible. I tried reducing the screen resolution and a variety of pdf readers (Preview, Acrobat, Skim), all with the same result: when scrolling, the pdf jumps. Never had this problem with the 2012 Macbook Air. Any thoughts?