It is always special to fly with the vultures. They don't seem to be bothered by us much when sharing thermals as long as you behave predictably and respect the turn direction and avoid cutting them off. I normally shut off the sound on my vario and try keep up to them as reference. Every now and then you think you're doing well and then they shift a little and get away from you without really trying. As for into wind glide and speed... well that is just plain embarrassing, the vulture kills us every time!