Update: ABC's take
“Lost” (9:00-10:00 p.m.)
Opposite stiff original demographic competition at 9:00p.m. on Fox (third half-hour of “American Idol” into the highly-promoted return of “Glee”) and NBC (second hour of a 2-hour “Biggest Loser”), ABC’s “Lost” surged from its lead-in by 41% in Adults 18-49 (3.8/10), beating out its non-“Idol”-driven competition in the time period on NBC (“Biggest Loser” = 3.7/9) and CBS (“NCIS: LA” replay = 1.9/5).
Source: ABC
Source: TVByTheNumbers