The mobile device reports all show the version of a device (ie Samsung Galaxy, Verizon Galaxy) for everything but Apple devices.
This needs fixed. Currently the only way to break down by screen resolution and even that isn't very helpful.
Adobe is relying on DeviceAtlas and device identification based on the User Agent. The browser agent does not provide this information.
So it's not just an question of reporting, but of device recognition.
You should vote here additionally: http://ideas.omniture.com/t5/Idea-Exchange-for-Adobe/More-detail-for-Mobile-Devices/idi-p/ 5759