Honestly think casting made this season with the intention of having an Amazing Race Team win. As great as the casting was for the BB Teams (2 winners, 4 Fan-favorite winners), you have 4 moms (most of which do not usually perform amazing on the show) along with 2 actual threats (Nicole/Vic). Survivor casting knew Rupert/Laura would be 1st boots, I highly doubt they thought Chris/Brett would do so well, and Corinne/Eliza were never physical competitors on the show. Team Amazing Race however all had fairly athletic people which is why its pretty much no surprise most made it to the end. Also putting all 3 F/F teams on the non-TAR side, while 3/4 M/M teams on the TAR side is a bit suspicious
Survivor should have put forth Ozzy if they wanted casuals to watch, plus he'd kill TAR. Lots of Survivor catches they missed out on