OK, enough of sourceless statements.
For whoever is interested, here is a rather interesting 3D Bitcoin node world map [
http://www.weusecoins.com/globe-bitcoin/].
I was just teasing but bitcoin has to be seen as a global currency not just a U.S. affair, because it is not.
In case this was a response to me at some level, I will need to mention that nodes are completely different from miners (though related via communication obviously), which is what was being referenced in this thread.
If you were not responding to me, then that is a fairly pretty picture, though I'm unsure of what line height represents. If it is traffic through the node, that's fairly interesting that middle america provides a supernode somewhere.
The use of Bitcoin as a global currency and the local sourcing of miners are unrelated, mining is in many ways it's own beast, helping to move the blockchain forward, authorizing transactions, and being rewarded for contributing, but basically invisible and separate from the commerce that would use the coins themselves.