>"Its the fleece under the down jacket that makes you "WARM", not the down in the outer shell.

It is my own humble opinion that high number down should not be used in down jackets "
-------------------------------

Hmm?? I don't dispute that you are reporting a real phenomenon you have experienced/observed, but I'm not sure it is because of down fill power. We have WM products with high fill power. I would agree with the language used by some reviewers "lofts like a blowfish" to describe how well they maintain their loft. It takes noticeably more effort to stuff our WM Ultralight than other bags we have. Also my wife's WM Meltdown jacket is light and extremely warm and not about to "deflate" from wind pressure. IME, higher fill power means exactly that -- more "pressure" exerted by the down to "inflate" the fabric and more resistance to "deflating" pressures.
_________________________
Human Resources Memo: Floggings will continue until morale improves.