There're many threads about this on HN. Here's one around an Economist feature: http://www.economist.com/node/21559618 http://www.economist.com/node/21559618

There're many threads about this on HN. Here's one around an Economist feature: http://www.economist.com/node/21559618 http://www.economist.com/node/21559618 (http://news.ycombinator.com/item?id=4589291 http://news.ycombinator.com/item?id=4589291)