Quality of online social relationships

I wrote a paper on this same topic last semester which discussed weather computer mediated communication was more effective in establishing relationships oppose to Face to Face communication. In this article they are basically doing the same thing. In my opinion Face to Face communication is better to use when establish a relationship. The survey used in this article uses face to face communication, phone, and  email categories  and compared college students surveys with bankers. In this cases talking on the phone is the most popular way to develop a relationship according to college students. While the bankers most popular what to establish relationships was Face to Face communication. I wonder why the author decide to compare bankers and students and not students from to different schools and two different countries i think the survey would have been better. Another thing that the author got from the survey was that people felt closer to those that they had face to face relationships with.