I use the internet to read long texts, and I haven't stopped readong books in long sessions - I just do it less often.
If you took away the internet tomorrow I suppose we'd all revert to reading more, and longer. It's a matter of habit, not "being made stupid". A vivid image of what should exist acts as a surrogate for reality. Pursuit of the image then prevents pursuit of the reality -- John K. Galbraith
Yeah, the title is dumb. But substitute 'mental routine' for 'habit' and refer to the alleged plasticity of the brain according to the author. I don't think the piece is all that wrong, apart from its negative characterisation of mental changes.