An excerpt from Robert Bianco's weekly online chat...for what it's worth...
Dallas, TX: Robert, I'm a little surprised after "The Amazing Race" has caught on this summer in its Tuesday time period that CBS hasn't considered running the next edition in that same time slot and holding off "Judging Amy" for a few weeks instead of dumping "Race" off on Saturdays. I would think the momentum it has gained would hold on through the fall on Tuesdays even though a die hard like myself would watch it if it were on at 3 in the morning on a Sunday. Last night was sooo good. I know you've been writing off the addition of the "yield" this year as an unnecessary potential for conflicts and I agree with you but watching arrogant Colin and Christie be the yieldees at time in the race when the move actual made much strategical sense was absolutely satisfying.
Robert Bianco: I apologize, because this will mean nothing to non-'Race' fans, but 'My ox is broken?' Really, how fabulous was that last night?
As for your question, though - yes, 'Race' did surprisingly well in this slot over the summer. But in a few weeks, it would be running against new episodes of 'L&O:SVU' and the well-promoted return of 'NYPD Blue' in its last season. Yes, fewer people will watch on Saturday, but that also means CBS's ratings expectations will be considerably, and perhaps more safely, lower.