Dr. John Lott runs the numbers on NICS* checks and comes up with a Low/ High on the 'false positive denials' on "Instant Checks"*
Anywhere between 94.4%- 99.97% of all 'Denials' in the Instant Check* system are false positives.
Here, Read the link
So, MR. FFL- Next time you think that someone is trying to use you to break the law because they get a delay on an instant check*, remember that the Govt is wrong about 95% of the time. The Govt. seems to be happy with that number.
*Only in Government can something be called "Instant" and be expected to take up to 5 business days (7 real days for those of us that do not punch a Govt. time clock). I guess that's what happens when you can have 'non-essential employees' as well.