I saw the ratings for last night's shows. DESPERATE HOUSEWIVES went through the roof as expected (though last Thursday's CSI outrated it for the week), and GREY'S ANATOMY also did very, very well.
The Martha Stewart movie with Cybill Shepherd did not do very well for CBS. Added to the very disappointing ratings for Martha's APPRENTICE show last Wednesday on NBC, and I'd say that perhaps the networks have overestimated Martha's appeal.
Her talk show's first two weeks have done average ratings, not a disaster, but not a huge hit either.