In "one day, now broken in two," what group of people does quindlen decide are "correct" in their views? those still undecided the realists the pessimists the optimists

The Realists

Anna Quindlen discusses the points of view of optimists--those who say we have come out of 9/11 better than we were before--and the pessimists--those who say we live in a cruel and savage world.  After mentioning both sides, she mentions the realists in the following sentence:  "The realists insist that both are right, and, as always, they are correct."