I got the 10k Surpass night about month after hitting the threshold (Jan 18). My renewal is mid-year so this was earlier than expected. I got no email after I hit 10k, just the email with the free night.
I was wondering where the 15k night was and just realized I am $50 shy of the spend. Hoping that night comes quickly also, but since my statement just closed I might be stuck waiting
My 15k night came as soon as I hit the spending threahold, not when that statement closed.