I don't believe it's "SR guaranteed". It's "SR or better guaranteed". I did factor this into my calculations.
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So after digging through my inventory, i got the following SSR all from pulls (regardless of method):
-21 Kami Weapons
-3 Non-Kami Weapons
-23 Eidolons
so if all of those was factored into 3k jewels and 3k NG per attempt, then i'd have done 67 10-draws (670 pulls) to net roughly 47 SSR items... just off that estimate alone, that sounds about in the ballpark of my last guess (my luck being in the 3-6% range of pulling ANY SSR)...
so yeah, i can be considered one of the luckier players... even though this is still rough estimates...
add in the tickets and such i used and this likely would be about 770-800 gacha attempts so far
yeah, that's the technical term for it. i'm used to calling it "guaranteed" instead of "or better guaranteed" due to other games putting it that way (like Final Fantasy Brave Exvius saying 4 star guaranteed, even though it can still give 5 star units at a confirmed 5% rate)