I came across this CMU presentation on why the purported ubiquity of power laws must be taken with a grain of salt: https://goo.gl/23PP7v https://goo.gl/23PP7v

I came across this CMU presentation on why the purported ubiquity of power laws must be taken with a grain of salt: https://goo.gl/23PP7v https://goo.gl/23PP7v Check from slide 32. As someone who doesn't have significant experience in statistics, I'd be grateful for an expert's opinion on the arguments presented in this presentation.