I must acknowledge that I have not read this book yet. From the decriptions I've read above, my first reaction was that many people in business don't understand variance and bell curves to start. The idea of using variance and bell curves is great in theory, but surprisingly rarely used in practice (outside of some specific industries; notably financial). I've found that many processes would benefit if people considered bell curves, probability, variance, etc. Isn't that what Deming's statistical process control, six sigma, and actuarial tables are all about?
Before you can appreciate something like The Black Swan (which I have no doubt in), don't you have to acknowledge and appreciate the underlying patterns of the world? I'm concerned that a book like this will cause the ignorant masses of business to discount bell curves altogether and continue to resort to conventional wisdom.
I strongly recommend Peter Bernstein's excellent book Against the Gods: The Remarkable Story of Risk. He describes a world where people believed all occurrences in the world were purely random. The Romans never conceived of the 1 in 6 probability associated with rolling a six-sided die. It wasn't until gamblers pondered how to gain an advantage in games of chance that statistical concepts emerged.
It's true that many industries including insurance and financial markets already rely on variance, bell curves, etc. However, there are many industries that remain as ignorant as the Romans and their dice. These industries would benefit more from embracing the concept of the bell curve than to be thrown totally off track with ideas like black swans. It's possible that some of the very companies in the funds Taleb manages may realize better returns if they used the bell curve to their advantage rather than deny its existence (or remain ignorant of it altogether).