This is yet to be seen. Certainly feels like I'm more productive but I'm not seeing any faster results. It would be nice for this to be studied more.
This is the key driver behind all those 'enshittification' problems that we see. Quantity over quality is almost always a balance and not a binary, if you start treating it as if one should always trump at the expense of the other then sooner or later it will catch up with you.