I don't know. I might say Fire and cold wouldn't be affected at all, since it saps Kinetic energy. Blast, and metal for sure, sand and water as well. Possibly Sonic. Probably Ice. It all depends on if you think the energy is Kinetic, or something else (like heat, or lack of)
Fire I could see as doing full damage, after a round or two as it passes through the intervening area. Cold would be uneffected, as would electricity. Light would be highly questionable (does light only move at 1m/sec inside the zone?

Blast: negated
Ice: uneffected
Light: uneffected
Metal: negated
Sand: partial. It could still jam up machines.
Smoke: partial. Slow isn't going to do anything about visibility penalties beyond it's range.

Sound: I'm reversing on this one. Sound waves aren't limited by speed limits, as they are the collision of one molecule with another (Slow isn't Silence) and each molecule doesn't move that fast.
Water: negated