I would not read to much into this infographic. So far as I can tell the data is drawn from a report published in 2005 (press release). That is simply too old to accurately reflect current reading habits, thus reducing this infographic to little more than a cute picture.
If nothing else, the rise of smartphones and ereaders in the past 8 years will have radically changed reading habits of their owners and probably increased the time spent reading.
The national literacy rates might be a better way to judge who reads more, but unfortunately that data is even older.