One thing that's interesting to me is that yes, everything is super linear with development, but there's one major diversion : all the communist countries had far better health than their income would indicate. They're one of the very few consistent and strong deviations from the linear money-health correlation. Also, by pretty much all measures Cuba is doing better than any other country in Latin America, which seems to totally validate Castro's governance (!!).
The UI of the gapminder tool is just super awesome, it's fun to play with, but like most google tools it suffers from lack of help/tool-tips/labels or something to give you a clue about all the ways you can interact with it.