I used to watch Dad, "Hitting the Break", back when he was flying Interceptors. He would appear over the field, and while performing this maneuver, the boundry layer controls would be moaning, and all kinds of vapor vortices would be visible. This was a hard pull, and there were lots of Delta pressures on the flight and control surfaces. One of the reasons for lower speed low altitude vapors are from these controls, and they use compressor bleed air, and the temperature differentials are very high. I have seen the wing vortices on prop driven planes too, but these usually occur when the humidity factors are just right .

Bill, AMA 4720
WACO Brotherhood #1