Should the narrator read the slide notes verbatim? Opinions please...

I’m developing some materials to support student elearning activities and I'm using Articulate.  For the uninitiated, the basic layout is the same as Powerpoint – a slide, a notes section and the ability to easily add audio narration.  As a learner, I really appreciate the benefits of audio.  It brings a human quality to written materials and I can listen in the car or at other opportune times.  But how does audio cooperate – or compete – with visuals?
Multiple Representation Principle
I asked the nice people on Twitter for their opinions and Jane Bozarth (@janebozarth) replied with a great research based article on how narrating slide content has been shown to ‘hurt the learning’.  From Mayer’s (2007) research, if you present audio and text on screen simultaneously, you overload the visual processing centres in the brain and reduce the learning effectiveness.  He calls it the ‘multiple representation principle’.
Now this didn’t settle the notes question – but it got me looking in some interesting places.  
Role of notes with audio
Ruth Clark (2002) reiterated the ‘multiple representation principle’ before specifically addressing the issue of supplementary notes. Clark says that the notes section should be an alternative to the audio.  I agree – notes should provide essentially the same content for learners who:
- do not like audio or prefer to read- cannot use audio due to environmental limitations e.g. a loud work environment
Still, the original question remained: should the audio and the alternative notes section match verbatim.  Jeanette Brooks (@jeanettebrooks) invited me to pose the question in the Articulate community forums - so I did and a lively discussion took place there.  I have heard about the Articulate community before and now I know why.  Lots of great developers hang out there offering advice and the benefit of their experience. 
The answer: most seem to choose verbatim
The majority of replies here seem to favour the use of verbatim notes – sometimes because of compliance issues or where multiple languages need to be supported.  It also makes searching for content easier. 
But not all
However, some Articulate developers also talked about less prescriptive approaches. One in particular struck a chord with me – Bruce (aka BrucUK) talks about how he views the relationship between slides, notes and audio here:
 If there's a need for translating Notes and audio, then verbatim is a good option.
My personal preference is to have Comments on the slides, Notes that flesh out the comments, and audio that explains and adds depth to the Notes. As said above however, I suspect that there's no "best" way. Bruce
From a developer point of view, I like this approach because it allows a developer to work at a high level initially where they can concentrate more on overall course structure and objectives.  Then they can fill that out by writing the notes and by the time they're ready to record the audio they will have an easy familiarity with the material.  That should help the audio should flow more naturally.  It can follow the notes closely without the stiffness of reading verbatim.     
Thank you
Thank you to everyone who helped to contribute to this answer, particularly @JaneBozarth @JeanetteBrooks @gallagher_msean @elearning @articulate
Bozarth Jane. (2010). Nuts and Bolts: Principles of Multimedia Learning. Learning Solutions Magazine. Retrieved 23 July 2010 from
Colvin Clark, Ruth. (2008). "Chapter 9 - e-Learning Design". Developing Technical Training: A Structured Approach for Developing Classroom and Computer-Based Instructional Materials, Third Edition. Pfeiffer.
Mayer, R.E. (Ed.). (2007). The Cambridge handbook of multimedia learning. New York: Cambridge University Press.

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