It would have cost him nothing (and he's the one with the money, in any case) to say "hey, I'm running late, it's important, it'll be a while longer" rather than simply not answering, as the article seems to say.
Either way, I wouldn't be booking anything 5 minutes after the pitch.
So he did the right thing from both perspectives. Which is probably why he's rich and has a (presumably) hot wife.
(I know that sounds politically incorrect, but alas, reality often is. To be fair, it probably works both ways: a man won't respect a woman who drops everything for him, either.)
It's not about dropping everything for the other person - I don't think anyone can expect that. It's about picking up the phone and saying "sorry, got to keep you waiting, it's important". Communicating and managing expectations.
It's a pretty minor quibble, I guess, but it just struck me as something rude.
sean