I have just finished a report on information consumption. We estimate that Americans consume an average of 34 GB per person per day, and 100,000 words. This is “information to the eyeballs” — we have not tried to estimate how much of that we actually assimilate.
Of course, gross averages like this hide a multitude of differences. For example, TV consumption among teenagers is lower than among old people. (Excuse me, “seniors” — since I’m getting up there myself I don’t need euphemisms.) About half of the 34 GB come from computer game playing, but gaming is highly diverse. 80% of us play games in some form, but most of the bytes come from high-end PCs with powerful graphics cards and dedicated players. And so forth.
I’m going to put a whole page on this site dedicated to the report and discussion of it. The report is available at http://hmi.ucsd.edu/howmuchinfo_research.php .