Apologies. It's IR-766:
"Moving 152 mm glass fiber batts from the top, to the middle and then to the bottom of a 240 mm deep cavity had no significant effect on sound insulation."
The world won't end if the insulation is lightly touching. Indeed most walls or floors that we all discuss have insulation touching one or both leaves. My only point was and is that you can't expect any practical damping to result.
The issue is that so many casual readers pick up on these things and don't ask further questions. I would hate to have a lurker read into this that this is a design goal.
I'm sure your build will go well.