Perhaps, but maybe a STAB move such as Rock Slide may also have done this trick due to STAB, plus its chance of flinching.
Pory is a beast :D 10% of flinching with dark pulse, 40% of paralysis due to T-bolt and Tri-attack, 40% of freeze due to Ice Beam and 30% chance to burn :bandit:
I'll say, that was an interesting set on vaporeon. :shocked: