I find it hard to believe that anyone working as a programmer / software engineer wouldn't be using any actual computer science (as in data structures, algorithm complexity,...). I could believe that most people working as engineers in civil/mechanical engineering would mainly use Excel, but not that they wouldn't be using exponential functions.

But I guess his point is rather that most graduates of engineering schools don't even work as engineers at all, which might be true, I don't know (I even have difficulty believing that given the number of people I know who weren't even trained as engineers and are now working as software engineers).