this is a powerful graph. so I assume it's subtlety wrong somehow.https://twitter.com/dylanwiliam/status/785303667305963523 …
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
oh i see, didn't pay attention to the countries represented/compared
i suppose countries they chose for comparison is also factor, but hard to find country even remotely demographically similar to US
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.