I disagree with you over your belief that the medium of information is irrelevant.
Everything, including medium, matters. There are going to be differences in the way our mind functions if it solely reads print newspapers versus online news versus random blog posts.
However, this difference may be for better or worse.
Unlike Carr, I don't believe these changes in information consumption habits are automatically negative. (Pessimism is never advantageous.) Instead, these changes are merely different.
It is far too soon to begin to see how reading blogs, or using Google is changing us. But, it definitely is changing us. How so, who knows?
We are a product of our time, and our time is indeed an age of blogs and Google.
The international institutions are still working on post-WWII power positions, which may be for better or for worse. To shake the global system up, do we need a catastrophic war to reposition the players? I doubt that any substantial changes will be made without such events.