The surviving lizards are the ones who are capable of holding on through hurricanes. The title almost implies that the lizards as a whole trained to get better at holding on. The article explains it well:

"He found that, on average, the post-hurricane lizards had toe pads that were 6 to 9 percent bigger than those of pre-hurricane individuals, and front legs that were 2 percent longer. This wasn’t because the bodies of specific lizards had changed; there’s no evidence that the toes of adult anoles can grow by that amount. Instead, the storms had simply wiped out all the lizards with small toe pads. By selecting for individuals that were better at clinging to surfaces—and presumably at withstanding high winds—the storms had changed the average proportions of the population."