Is iTunes really responsible? (Score 1)

How can NBC claim the ratings jump primarily on iTunes downloads? Yes, it's the most popular video podcast available on iTunes, but I would think moving the series from Tuesday night to the more popular (at least for NBC's 'Must See TV') Thursday night had a bigger influence than iTunes. I think it's great they are offering the series on iTunes, but I'm curious if they would still have had those 5.1 million viewers if the show was airing on Tuesday nights instead of Thursday? Not to mention their advertising budget promoting the show and it's new night?