It does imply that we'll never get everybody to agree on anything, and that's probably a good thing.
Person A doesn't want to change their beliefs with every shifting wind and person B doesn't want to ignore the winds entirely because there might be something there. We need both types of people to have a rational society, I think. The tension is healthy.
Given the results of this experiment, I can totally see liberal-brained people starting to pity conservative-brained people, but wait until the next experiment, when the liberal-brained people are paralyzed by indecision and conflicting information while the conservative-brained people go blowing through the tests. You can construct any test you want to make either side seem better. :)