Can't disagree with you ATP . I know the FAA/Terps circling criteria is much more restrictive , (don't know the exact numbers as I don't need them ), hence perhaps the need to "up" it .
PansOps :
Circling Speed : CAT C 180 knots max ,
CAT D 205 knot max .
Circling radii : CAT C 4.20 nm
CAT D 5.28 nm .
Hence the point some are trying to make , different strokes ..