I see Surf mag has published their test online. They used to charge zwei Euro for them if you hadnt bought/subscribed the mag.
I think they do the best tests, quite detailed and give recommendations for the type of sailor each board is best for.
Usually there is an accompanying video on UT showing rocker lines, bottom shapes etc.
www.surf-magazin.de/windsurfen/boards/wave/waveboards-2024-neun-neue-wave-allrounder-im-test/
They have been doing the best reviews since forever! The videos are a bonus and offer some more background.
It's one of the last windsurfing magazines standing, I hope they will be around for a long time to come.
I remember the excitement in the 80's when a new issue was coming out. Going to the new agent umpteenth times until it would finally drop. Had to learn German for it, just to make sense of it all.... I like to think that the German I speak now is actually because of this magazine.