Because most of the rest of the candidates are idiots, and she is not, she came across as halfway intelligent.
More about her performance:
Former Hewlett-Packard CEO Carly Fiorina landed the evening’s first real blow, responding to Martha MacCallum’s question about “the huge disparity between the poll numbers that [Donald Trump] has and the numbers you have” by insisting that Trump’s not “getting the better of her.”
“I don’t know,” she said, “I didn’t get a phone call from Bill Clinton before I jumped in the race. Did any of you guys get a phone call from Bill Clinton? I didn’t.”
In other words, is Donald Trump a stalking horse for Hillary Clinton?