RAT,
He mentioned using WET figures for dispatch (Landing) not T/0.I guess their pilots may come to be restricted by their Landing weight for a given runway,so they use the actual dry landing distances ( reducing their company standard dispatch landing distance by 15% (they use wet as standard) so that for the same runway length they increase their company allowable performance landing weight(more fuel?pilots point of view?or pilots sense of business for the airline by carrying more load?).
Also I doubt pilots would use wet speeds as standard for obviously dangerous perf problems after a GO decision
411A,
EASA countries do not include reverse credit on DRY runways for Take off (only WET) on the 737 as it was done for its certification by boeing (under FAA rule) and no reverse credit for DISPATCH landing distances on dry or wet.
In flight QRH landing distance do credit for reverse use depending on A/B setting and runway friction.
I dont see any reason why the FAA would do otherwise.