You're right, "entirely different sample" is a bit of an exaggeration. Assuming they've stumbled upon a constant for social interaction, it may be for our socie

You're right, "entirely different sample" is a bit of an exaggeration. Assuming they've stumbled upon a constant for social interaction, it may be for our society rather than our species. There's no telling without further testing. But that the experiment using instant messaging didn't a have a significantly lower average degree-of-separation really does surprise me.