KFC (Kentucky Fried Chicken) has recently demonstrated the power of Twitter for consumer brands – or has it? The story goes that Oprah Winfrey talked about the launch of the company’s grilled chicken offering on her show, in the process citing a voucher that could be downloaded from the KFC Web site. The voucher then hit Twitter, both organically and because it was placed there by KFC. The result was a huge upturn in sales and so many Web hits that the KFC site crashed.

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