My guess is she will come off as half-baked which is what the Democrats wanted to avoid. She had gravitas due to her credentials before she opened her mouth. There is no way she can stay on the script.
Grassley gave her an out by letting her stop the proceedings at her request - she will ask for a recess or run out of the room crying, leaving everyone in limbo. There is no way her portion ends today with a "Thank You" on either side.