Richard Nisley has said that loft is not an accurate method of measuring the warmth of down insulation, and has provided information and data which appear to support the assertion. BPL seems to think otherwise: are there any position statements, rebuttals, etc which explain why? (This point is frustrating given BPL's stated commitment to the scientific/objective method.)
Whatever the case, thanks for the article! Of course, BPL continues to be a wonderful resource, whether or not it's "perfect."