I'm really surprised by the Survivor move. CBS must think that the original TAR time slot of a decade ago will improve Survivor's demo numbers, otherwise it makes no sense.
Actually it makes perfect sense. CBS had the umber one show on THursday 8pm slot (bya significant margin) they are replacing it with a show that scored evenhigher on Monday, and are hoping they can branch coemdy on Thursday.
For years they have tried comedies on Wednesday with no real success.
Last year the 8-9pm timeslot was getting a 2.1-1.7 in the demo. THey expect survivor to do a lot better then that. They don't expect it to match what it got on Thursday but if it can hold 70% or more of its audience then it will still be a huge improvement on what they were getting on that night.
The idea is to always have a strong anchor for a night, the only night on M-Thursday that didn't was Wednesday.
The other option was for them to stick with comedy on Wednesday (with BBT and **** My Dad Says), but comedy hasn't been that strong and with only BBT being a tested show, it leaves more room for failure. With the Comedies going to Thursday (an already strong night) it gives less chance for those shows to fail. And with Survivor being a full hour it really helps gives the whole lineup of Wednesday a strong, strong anchor.
The moves CBS made (as we can't judge the new shows yet) is some of the best choices I have ever seen CBS make.