I know people are going to doubt me, but my cycle was over in a week. I honestly never saw a spike, even though i had shrimp in there.
My rock came from the ocean in the morning, and into my curing totes by 4pm that night. It didn't have any die off that i could tell. They were in my curing totes for 2 weeks (mainly because i didn't want to set up my tank before going on vacation). Even when i was pulling out of the curing tanks, i had nothing dead in the bottom of them. Maybe the bacteria was forming in the curing tanks, and nothing died off between moving from the tanks to my 75, i dont know. I have TONS of stars, had tons of crabs and urchins, and my rock is covered in coralline, sponges, slimes, clear anenomes, tons of feather dusters, etc so i know there couldn't have been a high ammonia spike.
I put in the CUC and have only lost 2 mexican turbo snails, a couple astreas (mainly found upside down), and a couple hermits since last august.