“Some in Tar Valon,” Moiraine said quietly, “claim that Ogier sanctuary prolonged the Breaking and made it worse. Others say that if all of those men had been allowed to go mad at once, there would have been nothing left of the world. I am of the Blue Ajah, Loial; unlike the Red Ajah, we hold to the second view. Sanctuary helped to save what could be saved. Continue, please.”

Regardless of whether or not Ogier sanctuary made the Breaking better or worse it certainly made it longer. So apparently Jordan thought that several of them were able to hold out for a century or two.