OMG it's Azunya-chan with a taiyaki ^_^ (really need to make taiyaki again)
ontopic: The answer is like dandolf said no.
Deep freeze only deals damage against targets permanently immune to stuns. Since a player is never permanently immune to stuns but only temporarily it will deal no damage.
The reason Deep Freeze has dmg on the tool tip, is because it's the base talent from Frost mages. So it would be useless if it was imune to raid bosses and dealt nothing. Making the dmg needed so it would make frost useful in raids.
With the glyph in 5man heroics i was doing close to 100k crits.
But for PVP, i think the glyphs needed is
Frost Bolt (5% crit to FB)
Ice Lance (5% extra dmg with Ice Lance)
Cone of Cold (25% more dmg with COC)
Major
Evocation
Ice barrier
Frost Nova
I'm not 100% on the glyph choices, but they seem to be the most useful for PVP.