Some confusion about social media here.
Not particularly agreeing with the sentiments. For example 140 chars is plenty for informed discussions - you are allowed more than one tweet in a conversation, plus it encourages you to think and speak concisely each time.
Also, the quote about wearing your tweets on your T-shirt for the rest of your life suggests that the guru is more of a marketing, "write-only" type of person. Social media is two-way, not broadcast.