Are there any evaluations about how much (%) of their targets the Kamikaze were able to hit in WW2?
I admit it's not quite the same, because a 737 (544 mph) is much faster, but comparable: plane hits big object
Yokosuka MXY-7 570mph

This one is quite an exception because it was not used very long, only in the final phase of the Pacific War. And it was more a rocket than a plane, that's why it was 200mph faster than normal military planes of this time.
Mitsubishi A6M 360mph
Nakajima Ki-43 313mph
Dear John,
I also know that you planned to make a video-experiment with some pilots on this issue. What were the results?