Congrats to Jason Day! His tempo has historically been a little slow on the backswing and then fast on the downswing. However, I’ve noticed that he’s starting to speed up his backswing and this is much more in sync with his downswing. So, he’s:
21-23 frames back
7-8 frames down
Thus, he has approx. the 3:1 ratio and also less than 1 second from takeaway to impact. This lines up much more with his hero, Tiger Woods, who had basically had perfect tempo from 1997-2008.