PRO-NOR-SOP-21-D (Landing)
It is now an Airbus SOP across all the fleets I have seen. Most recently the LR Fleet in our company has lined up with the A380 and explicitly stated that Idle Reverse cannot be used on Wet runways (or worse). If you haven't seen it yet, then it will be in an upcoming revision unless your Flight Ops department customises it out.
In my view it is an overly restrictive application that arises as a consequence of how EASA certification and operational regs are written.
It gives no flexibility to, or at least places a large risk management burden on, operators that fly to airports where idle reverse is required under certain conditions (curfew shoulder periods etc).
I can't comment on the techinique (reverse before NLG touchdown) as it sounds like it might be a type I have not flown.