I saw it too. I wouldn't even say the shift was subtle. Inching toward hostile. Especially when Moose was up to bat.
IMHO, the questioners' tone was not so much due to lack of answers. Reporters are accustomed to being stonewalled. And they'll accept that when there's good reason. They'll defer to competence.
I think there's genuine alarm over the competence of this "committee," whose spokesperson invites speculation about what the spawn of a menage a trois between Joe Lockhart, Cynthia McKinney and Norm Crosby would sound like.