It's remarkable how strong the Charlie Brown specials continue to perform in the ratings, year after year. "A Charlie Brown Thanksgiving" is not the most popular entry in the beloved animated franchise (both "A Charlie Brown Christmas" and It's the "Great Pumpkin, Charlie Brown" deliver bigger numbers). Yet the program still managed to hold its own against CBS' "Survivor" and Fox's "The X-Factor" (in fact, the special edged out Factor in total viewers, see below). Plus,"A Charlie Brown Thanksgiving" delivered its biggest audience in four years — 8.1 million viewers and a 2.2 rating in the adult demo, up 22 percent from last year. Pretty spry for a 39-year-old repeat, huh?