Speaking for myself (a grown-up) I do read a lot on my phone, but it's almost all "brain junk food" like Hacker News comments :) instead of something which slowly develops a complex idea like a book.
Even worse is the plague that are PDFs, for instance for science papers, the reading of which is a miserable experience due to too big fixed pages (lack of reflow).
Even worse is the plague that are PDFs, for instance for science papers, the reading of which is a miserable experience due to too big fixed pages (lack of reflow).