This research is built on some pretty shaky ground—including some very loaded picking-and-choosing of vocabulary—and because it doesn't have very strong predictive power, hasn't made much of a dent in the community in the last decade since it's been published. Here's a discussion from the blog Language Log that discusses a lot of the methodological problems that show up: https://languagelog.ldc.upenn.edu/nll/?p=4612