Why would the companies bother? Most of them are relying mostly on brand-image anyway.
This, and on top, the results are of no use for the riders: an experienced rider uses a kite and immediately knows if he likes it or not. The feel of it. He does not bother with sheets of numbers. An unexperienced rider wouldn't understand the numbers anyways.
A little test: assume a kite has
flat surface: 9.02m2
projected surface: 6.22m2
l/d at 5º AoA: 5
l/d at 7.5º AoA: 4.5
l/d at 10º AoA: 3
l/d at 15º AoA: 1
rear line pressure at 5º AoA: 32N
rear line pressure at 10º AoA: 50N
turning rate at 80% steering input: 0.5 /sec
Would you like that kite?