Wow,
didn't we debate this very thing S-61 thing with you last time Pfan?? Try running a search, and that might reduce Nick's requirements to cut and paste. Again.
There is VRS.
There is terminating with insufficient power.
They are not the same thing, no matter how the unfortunately confusing terms settling with power and power settling make you think you can mix the two. It is always amusing how inaccurate labels can so easily lead to the formulation of amazing aerodynamic theories. See also the LTE in a AS350 thread.
I'm sure Lu is trying to log on about now.