This is exactly what I came here to say. It's all well and good that certain things (quiz) correlate more to performing well in a long-form remote coding task.

This is exactly what I came here to say. It's all well and good that certain things (quiz) correlate more to performing well in a long-form remote coding task. But part of the problem of hiring is that these test-style code questions are themselves not necessarily good indicators of future job performance. The only way to truly analyze whether a given technique is working or not is to follow the candidates through into their jobs and see which ones actually become good long term employees.