The CNN Republican presidential debate of September 16 was supposed to be two hours long. But once it got started, it was so useful in portraying the views of the eleven candidates that CNN decided to extend it to three hours. It was closer to being a true debate than the August FOX debate had been. It is now as clear as anything that a debate with a large number of candidates can be successful. After tonight, there simply is no coherent argument for general election debates that only include the two major party nominees.
As mentioned here before, in all U.S. history, there has never been a presidential election in which more than seven candidates had enough presidential elector candidates to theoretically win the election.
UPDATE: the debate was watched by 23,000,000 viewers. See this story. That is the most-watched CNN program ever. Thanks to PoliticalWire for that link.