Considering the iPad is mainly used as a news consumption device the used apps are not surprising.
Ups, must have confused the Multitask-bar with the Dock. I haven't changed the dock, except for adding settings, as it is too small to hold all apps which are regularly used. So rather then deciding which app to include, I have all frequently used apps on Home Screen 1 and just don't use the Dock, except for Safari.
Is there no way of removing an attachment?