Anthony here's what the paleontologist said in the article from your link. The last line of the first paragraph "It's discovery sheds light on a pivotal point" and the first line of the second paragraph of the link you posted states the same thing that Wikipedia said only using different words "Tiktaalik looks like a cross between". If you read the entire article you run across terms like "consequently very interesting", "the answer is not entirely",and "infer". None of those terms convey certainty and those are all from the article from your link.