Just my opinion, (I know, here we go again), BUT -

there is very little chance that they rig the challenges. The logistical coordination necessary in setting up a POV challenge, a food challenge, an HOH challenge and possibly reward challenges each week is formidable enough to pull off on a predetermined schedule. Certainly doable, but pressure packed.

But to to hold the production meetings necessary to agree on a course of action (committees), then design, plan, schedule manpower to put together an event to favor a hamster who was nominated just a day or two before is too risky.

One chief goal of the production staff is to ensure that the events are ready on time, and that they seem professionally done, and that they seem polished, ingeneous, and Entertaining. To think that they would risk a professional production, 10s of millions of dollars (serious stuff) to favor a specific BB7 hamster, even a popular one, is not reasonable.

Additionally, to think that they would do to favor Chicken George? Well, as NB mentioned, it is tin foil hat time.

No doubt some BB7ers are more likely to do well in different types of challenges, but that's just the way it is. No challenge they could design would be perfectly neutral in that respect.