It's Garuda who mentions that we've been "touched" by Hydaelyn.

Ifrit states that he does not sense the taint of another upon us to refute his priest's claim that we must've been tempered by something else already, then concludes we must be of the "godless blessed's number".

Both Ifrit and Leviathan also mention the blessing of light specifically but cite it more as the reason why we were able to best them simply by virtue of how abnormally strong we are compared to the average mortal.

I suppose in that sense it's an additive retcon because we always knew it afforded some manner of protection, but they refrained from being specific about it until EW.