Well, I never found either of the stories I originally read about Jackson Pollack and the use of fractals in his art. But, I did find an article in which the author of the study talks about his research (http://media.www.dailyemerald.com/media/storage/paper859/news/2004/11/24/News/Fractals.Reveal.Mysterious.Links.Between.Stress.And.Art-1968806.shtml), and another article questioning some of the methodology used by the author (http://www.sciencenews.org/articles/20070224/bob9.asp).
Seems there's no consensus on what qualifies as a fractal. The main question seems to be over what range the pattern needs to repeat to qualify as fractal. While Taylors work was consistent with that of many other peer-reviewed papers, some believe the term should be reserved for patterns that appear over an even greater number of orders of magnitude. Not to cop out on this, but I just don't know enough about the topic to weigh in on that. But I will say, fractal or not, the criticisms I found were over the application of the term "fractal," not over whether people seem to have a propensity for the frequencies of fractals that occur in nature.