i totally didn't believe this, so i wrote a small script to test it, and 'lo --pic.twitter.com/suTIkc9sH1
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
Thanks! Those two are important!
HHHHH has two instances of HHHH in, so given a full enumeration, there are four HHHH and four HHHT contained in the set of all possible strings of length 5: equal probability, which is exactly as you'd expect.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.