To your point, Yes, An NCRS Top Flight Award is an independent and highly objective confirmation that a particular car, at the time that it was judged, is both original to how the car was initially configured, and retains it's condition as close as judged to how it was the day it was assembled.
The car in this case, scored a 99.5 even with 9,800 miles.
Said another way. A car with 9800 miles earned 4477 points out of a possible 4500 the day that they judged it.
It just does not get statistically or significantly much better than that, period.
In laymen terms. one would call that car " near-perfect"
It has been authenticated to be a genuine ZR-1, with the proper power-train, equipment colors, trim, and is correct in all elements of it's originality and as near to new condition as one could find.
Such a car is universally understood to be correct just from viewing the judging sheets, and proof that operationally, it's basic functionality, was intact.
One does not need to "see" such a car to know that, PROVIDED it has been maintained since the award, which is all that then needs to be substantiated.
Does the above have an effect on the car's value?
Absolutely, there is no doubt.
However, any individual makes their own determination of "personal" value for themselves. This means that they are welcome to ignore or value such provenance or pedigree, but at the risk of being foolish should they choose to value their own opinion over highly codified and specific objective evaluation such as is done by knowledgeable groups such as the NCRS.
You need not like it, but it is that rigorous judging that strengthens the market value of the entire mark because of it's existence and is why the values move upwards as cars become eligible for judging.
An NCRS Top Flight or Bloomington Gold, Survivor, or Benchmark designation is the very definition of a "Blue-Chip" car.
Marty