I grow both CAROLINA SPRING FLING and MAMA DRAMA, and both are gorgeous plants and blooms. Neither one was completely established for me last summer but MAMA DRAMA did send up instant rebloom scapes.
In my experience, Judy does not exaggerate performance or other registration statistics. Her intros perform as well as or better than registered.
That said, instant rebloom is not guaranteed and is dependent on good care and good growing conditions. You need to wait till plants are well established before judging what they can do. And don't expect instant rebloom if growing in partial shade, drought, no fertilization conditions or in pots. Just my two cents.