We have quantitative data on several species and each example shows that a species can make significant progress. But that progress is measured in decades. All of the species (in the report) are still on the list and are likely to remain on the list for many decades to come.
(The new rule) would have done more for species recovery than critical habitat ever did.
It will make the extinction of species much more likely,
The report argues that the (low) figure is not the best measure of success or failure of the act to this point. Many endangered species are making steady progress toward recovery under the Endangered Species Act.