"I think one thing that I realized, looking back at it and analyzing it, is people are very unforgiving and very resistant to change," Couric told this week's New York magazine. The public reassessment marks a huge change for America's Sweetheart, who burst on to the stodgy network news scene last year as its first solo female anchor. But as her "CBS Evening News" ratings have plunged and her bosses mull changes to the show, Couric cast herself as a survivor - so far. "I've gone through a bit of a feeding frenzy and there's blood in the water and...