From a CBS press release:
The Premiere of "Survivor: Gabon" Wins the 8:00-9:00 PM Time Period in Viewers, Adults 18-49 and Adults 25-54
First Ever Two-Hour Premiere Nets Almost 13 Million Viewers From
SURVIVOR continued its Thursday (8:00-9:00 PM) winning streak, as the first hour of the two-hour premiere of SURVIVOR: GABON-GARDEN OF EDEN placed first in viewers, adults 18-49 and adults 25-54, according to preliminary Nielsen live plus same day ratings for Sept. 25.
SURVIVOR has won its Thursday (8:00-9:00 PM) time period every week against regularly scheduled competition in viewers and key demographics since 2002.
Last night's SURVIVOR debut was its first ever two-hour premiere and faced the highly promoted premieres of "Grey's Anatomy" and "The Office" in its second hour.
From 8:00-9:00 PM, SURVIVOR: GABON was first in households (7.8/13), viewers (13.05m), adults 25-54 (5.5/14) and adults 18-49 (4.4/13). CBS topped its closest competitor in the 8:00 PM hour by +18% in households (+1.2 rtg ), +53% in adults 25-54 (+1.9) +33% in both adults 18-49 (+1.1 rtg) and viewers (+3.27m).
From 8:00-10:00 PM, SURVIVOR: GABON (P) was tied for first in adults 25-54 (5.5/13, with ABC), second in households (7.6/12), viewers (12.91m) and adults 18-49 (4.4/11).
For the night, CBS was second in households (7.1/11), viewers (11.74m), adults 25-54 (4.8/11) and adults 18-49 (3.8/10).