Just to clarify - I DO believe that access to data and information is an essential element and, similarly to Brad Parks and Samantha Custer from AidData, firmly believe that open data and information is critical in underpinning decision making at every level. My main thrust is that this on its own is not enough to bring about change. We need to develop our understanding of the how "the magic" might happen and evolve our work to increase our impact.
So i would argue that essentially my blog post is making the same point rather than counter to Brad and Samantha - data IS important, but there are many other elements which are also important. We really need to do be doing a lot more to understand how we get to the usage and action end of things.
Equally we need to utilise our increasing understanding of what is happening to be able to demonstrate the impact of "open".