If Danny (GR Research) just presented his opinions of the questionable design decisions Wilson made with the Watt Puppy 8, I would likely not pay attention. But using before and after measurement graphs he proved why it's not a good idea to connect the 2 woofers in parallel due to the challenging 2.4 ohm load. He also proved that Wilson's mounting of the tweeter was causing excessive diffraction and figured out a simple yet effective way to use the grill to create a sort of tweeter waveguide to reduce the diffraction.
If you believe measurements have little to do with a speaker's SQ, that's a different issue. It would be interesting to hear from the owner of the speakers once he got them back from Danny.