No, but I saw Reddit comments about it but usually users report no issues anyway. It's weird that the air has faster NAND than the bro or base for the same 256 GB storage .... =\
I know the 17 Pro 512 GB and higher had the faster NAND versus the 256 GB base model.
As far as the 18 Pro models are concerned ... considering the increased cost of RAM (NAND too?), I personally see Apple continuing that trend in an attempt to increase profits as most folks probably purchase the base models.
Who knows, with all the leaks on the 18 Pro ... this question may already have an answer ...