Industry standard terminology is now "files" rather then "documents" (see Box and Dropbox).
This is both clearer and more accurate - to a user a document is a word document.
Throughout the Share UI are references to Document(s). Suggest these are all replaced with File(s).
We've already set a precedent for this with My Files, Shared Files and in the Alfresco Mobile interface.
The cherry on the cake would be to rename the Document Library "File Store".