The study shows that sounds such as "f" and "v...
I thought you'd get this one. :^)
I read the article, but it really doesn't have much in the way of any substanch to say at all.
Though I thought that you pinged me because it had something to say about the genetic group we are both interested in, re examples of language changes/commonality.
It's why we don't teach our little ones "uck" words.