Americans on average read or hear 100,000 words per day. Anyone who has read Kenneth Goldsmith's Soliloquy can compare that figure against one talkative avant-gardist's one-way talk (just Kenny going out, leaving aside what's coming in and not including his reading) for a week; just divide by seven. Here is your source for the factoid. The media "reporting" of the study that produced this information implies that it's all a disaster and that it's qualitatively as well as quantitatively new.
Oh, yes, and despite all the doomsaying about the end of reading and writing: people are reading and writing more than they did in 1980. Reading somewhat more and writing a whole lot more.