That's just not true. I agree. The author is full of it. He's probably from the school who still does long division.
What is your field of study, AmishDude? Just curious. Know anything about profile monitoring and generalized least squares?
I'm an extremal and probabilistic combinatorialist. I don't know what you refer to by "profile monitoring" and "generalized least squares" but I suspect I know what it is under a different name.