Herald of Ice - does quality alter the "added" cold damage?

Before I waste some GCP's on this, I need to confirm whether quality will effect the "added" cold damage to spells. I just started using it yesterday with my incinerator build because I wanted to add some damage. AT level 18, HOI increased by incinerate damage from 4599 (tool tip) to about 5400. Fireballs went from 5800 to 6600. I realize I don't get the "Shatter" damage but since i have no mana issues, I see HOI as a cheap way to add cold damage.

That's why I have a fear that the quality increase will only affect the "shatter" based AOE damage, not my initial added cold damage. Anybody have ideas?
It should affect all cold damage you deal.
IGN: @AmbushedByDongers
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