From what I'm seeing the 2080 Ti runs at 90+ FPS in MW.
Of course these are mfg.-released numbers. We'll have to wait a bit for independent reviewers to run head-to-head controlled benches.
I dunno where you got that number from, Here's a recent review by WWCCF Tech that includes COD:WM at 4K ultra:
Today is the big day for gamers as we review NVIDIA's latest Ampere GPU based flagship, the GeForce RTX 3080 10 GB GDDR6X graphics card.
73 FPS for a 2080ti at 4k Ultra, 3080 hits 101 so looks like the new AMD cards sits mid position between those cards in that game. I agree though can't draw much in way of conclusions until we get some real benchmarks.