Boofhead,
If the runway is wet, the runout area is covered in rubber, there is no stopway or there are close-in obstacles, it would be prudent to reduce the V1, but since this will affect the GO case it should be considered carefully. The contaminated runway speeds can be a guide for this although I do not know the legality of using these speeds on a dry runway.
This gives me the impression that you dont reduce the V1 on Wet Runways, where did you get this policy from?
Mutt.