There are too many independent reports now for this effect to be written of as imaginary.
Just taking the color test shows that people on the forum have different levels of acuity, (as well as different calibrated monitors and devices they are viewing on...)
To me, the effect would have to be noticed by hundreds, if not thousands of customers, for it to be a meaningful issue. Here in this forum is a bunch of hair splitting bb stacking bino geeks, and there is no consensus.
I've seen warm and cool differences between binoculars, in direct comparison, but not the explicit 'green' bias that some have claimed. Go look through a 50 year old pair of binoculars, and you'll likely see a very yellow bias. What's being discussed here is something much more subtle, that in my opinion, the eye/brain generally adapts to in short order.