Feedback on aria-hidden section of "Using WAI-ARIA in HTML" document

Feedback on aria-hidden section of "Using WAI-ARIA in HTML" document
https://dvcs.w3.org/hg/aria-unofficial/raw-file/tip/index.html

@hidden versus @aria-hidden section of the attributes table:

Element with a hidden attribute	aria-hidden=true	NO	Use the hidden attribute in conjunction with the CSS display:none property


There are differences between the two which should be called out. @hidden always hides content from all modalities, so this will result in the visible removable of the content in addition to removing that content from accessibility contexts. 

Depending on the UI design of a web interface, there are times when content needs to be hidden from screen readers. For example, sometimes content is rendered partially at the edge of a view (like a carousel) to indicate there is more that will become active once you click Next or scroll. In these circumstances, using @hidden would prevent the visual rendering of this "lead-in" content, so the document should recommend using @aria-hidden at some times.