To the best of my knowledge the price of jet fuel has not had any significant negative impact on part 91 corporate flight departments. In fact, every pure 91 jet operation I know of has been flying more than ever since the economic bubble burst in 2008. 135 operators have really been hurt by the bad economy and high fuel costs. My guess is the top wealthiest individuals/organizations can afford to buy jets for private use and fuel prices are not going to factor into their decision matrix. Whereas, the semi-wealthy who can afford to charter but cannot afford to actually own the jet are much more sensitive to increases in fuel costs.

Just my two cents.