100 years ago, society talked in books, each taking several hours to read.
80 years ago, it became radio, each show up to an hour.
60 years ago, television, a show is half an hour.
10 years ago, blogs, reading a post is 5-10 minutes.
Now, Twitter, each post takes 30 seconds to read.
I guess we simply have become fantastically efficient at expressing deep thoughts more and more succinctly. For surely we can't have on our conscience that we converse more and more shallowly?