Typically evolutionists make the most ambitious claims based on fossils that are fragmentary, i.e., the less they have to start with the more they can invent. For instance, about twenty years ago they found a fossil they called Sivapithecus and said it was a human ancestor. Creationists who looks at the fossil said it was probably an ape but it was too incomplete to be sure. Later a more complete fossil of a sivapithecus was found, and evolutionists had to admit it was just an orangutan.
In this article you can see they found three fairly complete skulls and they admit that they are humans. If the skulls were in little tiny pieces they could glue together however they wanted, who knows what claims they would make. If it was Johanson or the Leaky's, instead of Tim White, I suspect the claims would really be spectacular.