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ABC has the most popular television network website, just a shade more popular than NBC.com among the six broadcasters sampled by HitWise. But both websites are down in their relative share of the online audience, while CBS has greatly increased visits. Why? Well, for starters, CBS is ahead in the year-to-date ratings race for actual television. The top draws to the network sites are, once again, competitions and other game shows — American Idol was the top draw for Fox, Deal or No Deal for NBC and Dancing With the Stars for ABC. Almost every site, however, kept users on longer, with the average user spending three more minutes on CBS. Only visits to NBC got shorter, probably because some users are going to Hulu to watch full episodes of shows like The Office and 30 Rock