I think Kate did well under difficult circumstances. The audience were so hyped up that she had to resort to shouting 'and the next to go through is...' above the general uproar
However, I did sense that she was having to concentrate hard upon what the Producers were obviously shouting down her headset ('keep it moving, keep it moving, were running out of time!' etc.)
One bit which did suprise me was how she reacted when one of the judges said that they didnt want to have to choose between the final two groups, and Kate said something like 'Well, you're going to have to!'