I'm not terribly surprised since Survivor's ratings took e a hit, and that was without an original on ABC (FlashForward premieres next week on ABC at 8pm). I'm not really sure how much a Saturday encore will help, but I concede that it can't hurt anything. Via CBS press release:
THE PREMIERE OF "SURVIVOR: SAMOA" TO BE REBROADCAST SATURDAY, SEPTEMBER 19, 8:00-9:00 PM, ET/PT ON CBS Last night's premiere of SURVIVOR: SAMOA, the 19th edition of the hit reality series, will be rebroadcast on Saturday, Sept. 19 (8:00-9:00 PM, ET/PT) on the CBS Television Network.
CBS's revised schedule for Saturday, Sept. 19
8:00-9:00 PM SURVIVOR: SAMOA (R)
9:00-10:00 PM CSI (R)
10:00-11:00 PM 48 HOURS MYSTERY
Last season, I started watching Survivor again because it was available On-Demand and I got into it and the put it on my DVR even though I rarely watched it the same night anyway. In general, I enjoyed watching a couple of them at a time On-Demand rather than the one-at-a-time approach, but those sort of mini-binges really work for me.