Beamer : Changing font size in notes when using \setbeameroption{show notes on second screen}

I'm using Beamer with \setbeameroption{show notes on second screen} to add notes for each slide. I'd like to change the font size of the text in the notes so I can fit more text on the page.

Clues?

-

You can define font size for notes with \setbeamerfont{note page}{size=\tiny}, default size is \small.
This doesn't seem to be applied consistently in XeLaTeX, for subitems like \note{\begin{itemize}\item thing \begin{itemize} \item subthing \end{itemize}\end{itemize}}. – Trevor Alexander Dec 3 '14 at 22:59
@TrevorAlexander I cannot help you with XeLaTeX, but I think \tiny is the smallest font size so I doubt about making subtiems smaller. A new or follow-up question could be a god solution. – Ignasi Dec 4 '14 at 9:04