The Nielsen report says: from an average of 3 hrs that young smartphone users spend with their phone - 60% of this time is spent on entertainment & browsing. Now that's what I'd call Smart-Users.
We too published a Opera State of Mobile Web report on 'content preference across platforms'. Using anonymous and aggregate data, we were able to learn about the types of sites most frequented by people who browse using Opera Mini, based on the type of device they have (Android, Windows Phone, iPhone, feature phone or RIM). Do check out the report if you want to know more.
So what are you playing with on your smartphone?