Hi hetfield,
This was the reason I initiated this question.I thought that after TAM accident,it would be both Thrust levers to max reversers in case of all failures affecting landing performance,but this FCTM section created the doubt.
As such Airbus is recommending Rev Idle for long dry R/W and I have observed pilots have got so used to it that even after having briefed that they would use Max Rev on wet runways,probably due habit interfernce took only Idle Rev. And on top of this you have this FCTM procedure!!