At The Verge, Casey Newton writes about the problems Twitter the company is having -- it's not making as much money as it predicted it would and it's not really gaining users. Newton explores several corporate structure and environmental possibilities for the problem, focusing on the business angle.
My thought is that for every new person who tries to express coherent thoughts in bursts of 140 characters or less, at least one current user discovers that even when it can be done no one is interested and quits. Apparently there is a limit to the number of people who figure the best response to a watered-down oversimplified knee-jerk reaction to an event or statement is to squawk out another one. I have to confess that surprises me.