I have not experienced this issue myself, I have only read low speed - how would you hear it at higher speeds?
I planned to remove the potential of that problem when I rebuilt my front suspension,
New bolts for the subframe - sourced the recommended full length threaded replacement bolts
Mine is a late 2006 DSG, subframe looked like it had never been off - turned out mine already had full threaded bolts, not the waisted type that stretches - I am thinking the stretchy bolts were on early cars but have no evidence.