That is a huge step in the right direction from Twitter, but unfortunately it won't help much people from Central and South America, since all traffic out of the Americas is routed trough the USA anyway (and consequently trough the NSA).
For those unaware, this is not hyperbole on my part, the whole Central and South American sub-continents are served by not much more than a handful of Atlantic underwater cables and Pacific underwater cables, all of them terminating in Miami,USA (if the exception of one or two of the pacific ones terminating in California, USA). The connectivity in South America is so dependent on the USA that many times a packet from Chile to Argentina (neighbor countries in the far south of the continent) have to travel thousands of kilometers north to be routed trough the USA and come back south.
This connectivity dependence on the USA was reveled to be more of a problem after the the Snowden leaks. The leaks showed that the facilities in Miami responsible for routing the cables from South America, also house secret NSA rooms capable of intercepting any and all communication from those cables. Also, the leaks showed that the NSA had already intercepted many communications, among those emails and calls from top Brazilian government officials including the president Dilma Rousseff. And the intercepts where not limited to political motives, the NSA also intercepted emails and calls from South American companies in order to help USA competitors in large bids, for example helping Boeing in two different occasions, one in a dispute against the Brazilian Embraer, and another in Boeing's bid to sell the F18 to the Brazilian Air Force (this last one was a shoot in the foot, since the revelations in the leaks de facto removed the F18 from consideration and solidified the Brazilian choice of the Swedish Saab Gripen as Brazil's next fighter plane).
Fortunately there is hope for the near future here in South America as the Snowden leaks lead to a new push, spearheaded by Brazilian government, to install more inland fibers interconnecting neighbor countries, and to install new South Atlantic fiber cables connecting South America directly to Africa and Europe.