Spin Doctor,
There are always operators who do things differently to the manufacturers recommendations and procedures - generally instigated by small minded managers who think they know better.
I've seen a lot of it in the last 25 years, and some real beauties. One outfit I worked for had their own single engined NPA procedure in place for many years before the manufacturer found out and told them that a go-around would not meet the minimum climb gradient required.
Airbus have, in accordance with JAA and EASA criteria, published an Alert Height for use with All Weather Operations. For an operator to ignore the importance of this is either borne out of ignorance or arrogance.