How does iOS determine the automatic name for a folder?

When you drag an app over another app and it creates a folder, how is the folder name determined? I assumed it was the category name of the app you're dragging, but that doesn't always seem to be the case. At least when Apple apps are involved. Examples:

Drag SoundHound over Notes -> Music (this makes sense)
Drag Notes over SoundHound -> Productivity
Drag Notes over Settings -> Utilities
Drag Notes over Passbook -> Productivity
Drag Notes over Voice Memos -> Utilities
Drag Voice Memos over Notes -> Business

Right, just trying to understand. I'll stop thinking about it until iOS7 comes out and I check it out there.

Yes, it appears to be the category name of the app you're dragging (as I mentioned above). My question was how it works for the Apple apps, because as you can see from the examples, that breaks down. Not a big deal, just thought there might be a dev that knew.