Researchers at the University of Toronto have studied how social connections on Twitter relate to geographic location. The study revealed that Twitter users who regularly interact are often located near one another, writes Richard Florida, director of the university's Martin Prosperity Institute. "Their findings indicate that place and proximity continue to matter even in social media. Twitter doesn't replace the networks that exist in the real world -- it reinforces them and makes them stronger," he writes.
To read the full article: http://www.theatlanticcities.com/technology/2011/12/how-twitter-proves-place-matters/663/