Hi guys - I too received my 11 Pro and immediately noticed the very warm white balance, and overall yellowish hue on the screen. I promptly went to the local apple store to compare to other 11 Pros and realized that my screen was SLIGHTLY warmer than the floor models (my bro said I was crazy they were the same), but SIGNIFICANTLY brighter and sharper, with all settings equal.
My OCD not satisfied, I broke out an old colorimeter that I use to color calibrate my monitors and generate color profiles. Using a pure white (255,255,255) target on each device, I tested my new 11 Pro, my old iPhone 7, and my Macbook Pro. The standard in the graphics and print industry is 6500K at pure white - this is what almost all professional print, broadcast, photo, and graphics pros strive for. The results were surprising: Macbook was slightly cooler at ~6770K, old iPhone 7 was a nuclear 8900K, and the new 11 Pro was nearly SPOT ON at 6553K!
I think the take home message here is that our brains have been conditioned to perceive very cool colors as "vibrant" or "clearer" even though it's definitely not industry standard. Results attached.