The media said it, so it must be true

From a story on the ABC News website today, entitled First Palin Interviews Get Mixed Reaction:

So, how did she do?

Appearing extremely rehearsed and slightly nervous, Gov. Sarah Palin sat down with ABC's Charles Gibson for interviews that aired Thursday on "World News" and "Nightline."

Just what does "extremely rehearsed" look like? And how does such an interpretation by the reporter belong in the lede of a news story? (Hint: it doesn't, unless you have an agenda.)