[byrneseyeview]

I suspect that if that were really the case, you'd hear about it from corporate jet sellers ("We compared our clients to their Fortune 500 peers, and found that companies with jets outperform the rest of the market by 2% a year!")

[physcab]

Well, to be fair, I wouldn't hear about it, because I do not make >20million a year :)

I wonder how advertising works for the super-super-duper rich?

[arebop]

As it turns out, this is actually one of the selling points used by the manufacturers: "If time is money, then the time saved jetting from continent to continent is money in the bank." --- http://www.gulfstream.com/products/g650/

They're not generally selling to engineers so AFAIK they don't try to make the argument rigorous and quantitative, but there it is.