The negation of this sentence is also a reasonable interpretation of the results described in the article: The process may be unlike how our own solar system was created and also could be another indicator that Earth-sized planets are comparatively rare in the universe.
Since approximately a quarter of the observations found unexpectedly long-lived dust rings, this suggests that the distribution of material agglomeration with time is greater than previously had been thought. This does not seem all that surprising.
Oops. Must be a distortion in the Matrix.