Just my take. If you think the WB is quiet.....you're either not as close as I was.....or you haven't compared it with a drop-away.
I have shot and owned nearly every newer rest out there, believe it if you wish or not. I would not in my experience consider the WB noisey.
The WB that I owned is the only one I can speak for. I used the "aluminum" biscuit with Gold Tip carbon arrows. It was silent upon draw.
Perhapsthose who arehaving noise issues..... maybe theirarrow fits to tight inside the biscuit? Or their arrow has an abrasive finish / texture causing the noise?