Ironic as it may sound, Twitter or none of its ecosystem apps feature in the list.
Amazon App Store is a prominent presence which could turn out to be a problem for Andriod Market.
Facebook usage surpasses Google Search or Google Maps or Gmail.
All age groups use YouTube rigorously.
Android users are striking some balance and getting some work done which is indicated by the usage of apps like Quickoffice and Adobe Reader. Of course you can read porn using an Adobe Reader but I am just making an assumption.