[EEBio]

Abstract is not (only) the main finding of the study. It’s often a mini version of the article, with a background, methods, results and conclusion.

The length of the abstract in the linked article is well justified, in my opinion.

[tuatoru]

I understand that the point of an abstract is to tell a researcher in the field whether or not the paper is worth reading. I don't think the authors of this paper understand that, though. My reaction was "well, that's two minutes of my life I won't get back."