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 continen

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/ 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.