In a sense, he's right. Then next time Brandon Heath and I chat, I'll know what he's been up to, because I keep up with him on Twitter. I know my friend Harrison stubbed his toe a couple days ago. My Mom knew that I had a Doctor's appointment today, because she follows me on Twitter. It IS a form of communication. And a lesser one.
Consider someone about to lose their job. Or maybe they're about to receive the unpleasant end of a break-up. There are some conversations that must be done face to face. We've seen it in movies, "You're breaking Up with me?!? Over the PHONE??!?" Can you imagine how irate you would be if you were informed that you were fired in an EMAIL? With a TEXT?? What if you found out by following your bosses Twitter account? "I fired Aaron today...felt good." When something important has to be communicated, you do it face to face.
I have a cold. I can't hug or kiss my family lest they get sick. Try explaining to a 2 year old why "Daddy can't hold you" or "Daddy can't play right now", when that's all you want to do.
Think about how when God wanted to communicate Salvation to His children, he wanted us to do more than just read about it by following His account. He came in the flesh!