Now, the question is: would you have still done the following if you didn’t have online networking sites? Probably. The author’s argument is that we would still network even if we didn’t have online networking sites and thus online networking sites don’t have that much of an impact.
I actually believe the opposite. When you make something easier you will increase the amount of the activity. Another advantage of online networking is that it dramatically increases the number of weak ties which greatly increases the reach of our networking. So instead of being six degrees away we now may be only four degrees away. Now, to find research that tests that hypothesis.