Kiner's survey was posted here, T&F and ATA's website.
Judging from the demographic data (which ATA acknowledged), it's a pretty good cross section of ATA shooters & trapshooters, in general. It does have a sprinkling of SC, skeet and games shooters.
Without resorting to some pretty complex, timeconsuming and expensive methods, his survey is valid and reliable (both terms of art, btw).
And ... IF you've looked at the results pretty carefully - as opposed to fingertipping your transient thoughts to the list - it passes the smell-test, too.
There will be another survey after the Grand.
Bob