Dude, the fact that Leno was moved to 10pm AS A COST CUTTING MOVE is absolutely no secret. The thought is, yeah, revenues will go down but so will expenses so we will win out in the end. But they ignored it would really tick off affiliates needing a solid intro to their nightly 11/10pm news which is their big cash cow.
There was really no threat of him going to another network. NO network of not was offering him 10pm (9 central) and if someone like Fox had offered more money NBC could have just decided to match (or not) without cutting an hour of prime time programming.
http://www.nytimes.com/2009/09/12/arts/television/12leno.html?_r=1
Mr. Leno’s show could reduce prime-time costs in the 10 p.m. hour by as much as 80 percent — if he succeeds. While NBC has resisted disclosing what its scale for that success will be, Mr. Gaspin put a firm number on it. “We believe a mid-1 rating is viable for us,” he said, narrowing that specifically to a rating of 1.5 in the audience group that NBC bases all its advertising sales on: adult viewers between the ages of 18 and 49.
It’s a modest number, representing only about two million viewers in that demographic category. By comparison, almost no 10 p.m. drama on last season averaged a number that low. Some in that vicinity, like “Eli Stone” and “Cupid” on ABC (both averaged a 1.7 rating among viewers 18 to 49) and “The Philanthropist” on NBC (a 1.5) had something in common: they were canceled. Mr. Leno’s show will cost far less than any of those, but if he averages only a 1.5 rating, he is not likely to beat much rival programming at 10 p.m.
Competitors will surely accuse NBC of setting the bar as low as possible. But the idea is untried, so any estimate is guesswork.
=======
Another article emphasizing the cost-cutting reasons for the move.
http://www.nytimes.com/2009/06/01/business/media/01leno.html
If successful, “The Jay Leno Show” at 10 p.m. could reshape prime time by leading other networks to move to less expensive shows, pushing more programming to cable and rewriting the financial underpinnings of entertainment production.
If it fails — as skeptics, including many rival network executives, predict — then NBC will be left scrambling to find fill five prime-time hours a week.
Prime time has “looked pretty much the same” for decades, said Robert Thompson, a professor of television at Syracuse University. Pitting a low-cost talk format like Mr. Leno’s show against the typically expensive dramas at 10 p.m., he said, “is the biggest sign yet that we’re really, finally entering a whole new ballgame.”