Possibly what the OP might be thinking about is why TORR and TODR increases with a wet runway.
On a balanced field, V1 is lowered to counter the increased stopping distance on a wet runway (your braking is degraded, so you must initiate the stop at a lower speed in order to accelerate and stop in a given distance).
Now, it is given that you must be able to continue single-engine from V1 (actually Vef, but let's disregard that difference for the matter of this discussion). The distance needed to accelerate from V1 to V2 is increased because the difference is larger, because the V1 is lower.
Dispatch rules for reduced screen height, as well as balanced RTOW calculations will probably give you some variations to this, but the concept is still that a wet runway gives higher ASDR, which is counterd by a lower V1 giving again a shorter ASDR, but the lower V1 gives you a longer TORR/TODR.