According to ThinkPlease who read "the paper itself", and summarized it to say the scientists "took this gene ... in the particular species of shrimp, and told it to activate itself in the thorax region..."
And also said "this is the first time that someone has actually manipulated a small bit of the genetic code..."
Scientists conducting genetic engineering by no means "answers the question as to how evolution can introduce big changes into an animal's body shape and still generate a living animal" as Professor William McGinnis states in the article.
You are right, RaceBannon, this is simply scientists conducting genetic engineering. No more, no less.