Funny....
I absorb written material much better from digital presentations of text (particularly if I have the option of reading in bright text against a dark background) than from the printed page, which I did for much of my life. I wonder if the studies grouped all digital media together, or separated phones, tablets, laptops, and desktop systems — I find reading text of any kind on a 27-inch (or larger), high-deft high-contrast flat panel to be much easier than on any other medium.