While the guy is cracked regarding binding adjustment and perhaps a few other things (I kind of lost interest after a few paragraphs), as a former shop technician with ten year experience, two instructor's clinics, and volunteer patrol work, he's right about ski manufacturing, boot fitting, binding design, and waxing/tuning.
90% of all recreation skiers get no added benefit from waxing or sharp edges. Modern bases are mostly so hard and dense that on particularly cold days you ski the wax off in a couple of runs anyway.
Similarly, if you can't make your skis carve, which is again about 90% of all recreational skiers, sharp edges aren't going to make one bit of difference.
Bindings design from manufacturer to manufacturer is nearly identical with the exception being Salmon and Rossignol (Look) toes and Rossignol (Look) heals. Marker once made the best all-around system with the M series toes and Rotomat heals. While their toes are essentially the same, I've never understood why they discontinued the Rotomat heals. That honor today for most thoughtful design goes to Tyrolia.
I think this guy's site, though this isn't made clear, is aimed towards recreational skiers.