Anti-Social Running Groups

On my way out of school today, I saw a pack of 6 Delta Delta Delta sisters jogging together. I thought that it was kind of funny that they were all wearing sorority t-shirts but it was kind of cool to see them all running...until I noticed that everyone was wearing headphones listening to their own iPods. How crazy is that? I've never been running with a group of people with headphones in. Isn't the point of group running to socialize? Maybe it is for me but they use the group to stay motivated or something. I promise not to do that.