Yes the sweet water test was anned because listening for sound is not how you test an acoustic.
I agree to sweetwater and think we cannot test a digital the same way as we test an acoustic.
I would go even further: The way an acoustic is measured is digital. The letoff point is reached or not. And if it is reached, one can see a lever moving. So it is a simple yes/no question (digital). This is the only way to get reliable results. If one tries to measure the downweight until you hear a sound, it is analoge. How loud must this sound be? Guessing? No way! So the way an acoustic is measured, is the best way to measure an acoustic. period.
But we are talking about digitals. We must eliminate all guess working. And on a digital, the only thing you can measure is how much weight is needed to make something like a harpsichord sound. And because it is always loud enough, it is a simple yes/no question.
Okay, in this way we cannot translate the downweight of a digital 1:1 to an acoustic. And we don't need to do. Because it isn't an acoustic anyway. But we can compare amongst digitals very precisely.
And for both piano types, the downweight does not reflect the players experience about how much force is needed to make it sound. Digitals can change the velocity curve. Acoustics can have different letoff distances...
But trying to estimate the let off point is worse.
100% true. And if the DP has no letoff point, 200% true.
So I think it is still a valid test.
With your information, I agree sweetwater made a valid test. And of coarse it is much more exact than doing tests with inaccurate weights like coins, performed by different people. Unfortunately the sweetwater table lacks some recent actions:
Kawai RHIII (maybe like Nord Grand? not really...)
Yamaha GrandTouch-S plastic (CLP-725/735)
Yamaha GrandTouch-S wood (CLP-745)
Yamaha GrandTouch w.o. counterweights (CLP-775)
Yamaha GrandTouch with counterweights (CLP-785)
But I believe you are correct an organ sound would appear to be off or on.
Not in Kawai world. Kawai made the organs touch sensitive. It is good for measuring upweight, only. For downweight I would go harpsichord.