I've heard this term used by you. I think you said it is the most commonly used grit and that it has a smoother sound than compression based grit.
I have a few questions about it:
Since it is a smoother sound, it it probably used in more melodic rock and metal and not used in something like deathcore?
Here's my main question: Since it relies on just what the name suggests, "bleeding air" from the glottis, does that mean it cannot work if you are using perfect vocal cord closure because only "poor vocal cord closure" (in standard contexts) means letting air leak through the cords, since the closure isn't that good and as a result, you can get a whispery sort of sound, even if it's a harsh whisper?
I ask that because it's my understanding that one of the main purposes of good cord closure is to prevent a whispery sound since that dries out the throat so much.
If my assumption is wrong and you use as good cord closure as in clean singing for bleeding air grit, then if the vocal cords are closed nicely, how does air "bleed' from the glottis?