Focus Groups are used to gauge whether someone win, lose, come across effectively or not.
He picked undecided voters in this audience who are split on Palin BEFORE the debate
"Very energetic & a very positive message"
"She is intelligent & know what she's talking about"
Interesting almost everyone in audience thought she won the debate!
See this link & watch live video
The audience said
"She is main street America"
All agree she's better than expected