as the grade goes up the cost of hanging the draws on send also goes up.
My instinct on this is no. My guess is it is related to the climber not the grade. For example. Adam Ondra onsights at very high level but he is willing to give it a go hanging draws. If the high grade made it too difficult for him to hang draws he would not have bothered trying he would have just to crush second go.
Lena is tiptoeing around what I think to be true.
If you are an onsight climber. Hanging draws makes little to no difference.
If, on the other hand, Red Pointing is your game even the thought of hanging your own draws is nauseating.