NBC hitting #1 is a striking development, given that they've been sucking wind (and turning hours back to the affiliates) for years. Does the third hour of "Today" count? Or, for that matter, do the morning news shows all count in the "daytime" rating?
Also, either TV Guide or something else in the checkout said recently that "Guiding Light" is the lowest rated hour in daytime, and that its future is on the rocks. So that would be one hour up for grabs. I suspect, however, if it went away, CBS would simply lengthen "Bold and Beautiful" to an hour and not program the other 30 minutes.