He might not. But I most definitely will. 
First of all, let me state that I read ebooks very often for my classes, and I've used ebooks for years because of my low vision. Reading from a paperback book is possible for me, but I prefer my Kindle. It would be wonderful if I could get my textbooks to display properly on my Kindle - damn DRM.
I'm going to look at several different studies:
http://eric.ed.gov/?id=EJ960556
http://sicet.org/journals/ijttl/issue1102/6_Schugar.pdf
http://www.ifets.info/journals/16_1/32.pdf
http://www.ncbi.nlm.nih.gov/pubmed/22882151
The issue under discussion here is whether or not paper books are better than ebooks in terms of reading comprehension and knowledge retention.
Schugar, Schugar, and Penny (2011) examined thirty students enrolled in a public university general composition course. They did not find any significant difference in reading comprehension between the students who used eReaders and those who used paper books (though they did find that the students who used eReaders did not utilize highlighting).
Wright, Fugett, and Caputa (2013) examined three young girls in the second-grade for their reading comprehension and vocabulary scores and found that there were no discernible differences between digital and print reading (the three girls served as their own controls within the study). The only difference found between the reading styles was that the girls were more likely to use reading resources when working with the digital text.
McClanahan, Williams, Kennedy, and Tate (2012) wrote an article describing how the use of an iPad as a primary reading tool helped a young child (Josh) who was diagnosed with ADHD. The iPad not only helped Josh to catch up in his reading ability, but also allowed him to gain greater control of his ability to focus.
No, it doesn't work that way. See Zambarbieri and Carniglia (2012), which found that there was no difference between the eye-tracking used by students between paper books and eReaders.
TL;DR - The debate is still going on between researchers as to whether ebooks are better or worse in terms of reading comprehension and knowledge retention.