Honestly Bob, at just about every meet I have been to, there is one person at the table who cannot get the AHT to work for them, I saw one guy fail it with a shave ready edge at the 2009 NC meet..
I am talking at skin level..
I have not found an end all be all test for a bevel set that works for everyone, I thought it was the AHT back in 08, but by 09 I had learned it wasn't, there are 3 good tests, they have to be able to use at least one of them, and trust it...