The description is pretty good. I find fatigue sets in at much higher doses with more "glare" in the way you describe. With stereo's that make me tired of listening it's always an accelerated process when playing music that isn't real simple or has such things like potentially piercing female vocals, brass, etc.
Glare doesn't go away when you turn it down, but the music gets boring on many stereos with the volume too low particularly when they are already suffering from problems that cause glare. It's not even necessarily that I want it to be off, it's more like you're tired of it and want to do something else. If it's very bad yes you just want to turn it off but frankly few audiophile setups are often that bad.
It seems like the talent of a stereo makes up for the fact that complicated music begins to muddle the sound with a fatiguing nature that can certainly be described as "glare". If you think about it the DAC could be processing large single notes, or dozens at a time. The noise within it is going to have a more negative impact on the complicated stuff, and the talent of the rest of the stereo that say does timbre well or whatever, can't make up for that fact.
On several recordings where Atkins and other people said the female vocals where just too much, unpleasant, I've found that to not be true on setups with extremely well treated AC power.
