To amplify: I can't find the quote but one of the historians of the French Revolution of 1789 wrote that it was not the product of poor people but of poor lawyers. You can have political/economic setups that disappoint the poor for generations - but if lawyers, teachers and doctors are sitting in their garrets freezing and starving you get revolution. Now, in their garrets, they have a laptop and broadband connection.

They all (demonstrators/dissenters) seem to know each other: not only is the network more powerful than the hierarchy - but the ad-hoc network has become easier to form. So if you "follow" somebody from the UCL occupation on Twitter, as I have done, you can easily run into a radical blogger from Egypt, or a lecturer in peaceful resistance in California who mainly does work on Burma so then there are the Burmese tweets to follow. During the early 20th century people would ride hanging on the undersides of train carriages across borders just to make links like these.