Don't believe everything you hear. While I respect HW's informed opinion on antiskate, the very statement you quote makes no sense. Why would he advise people to twist the wire in the first place if no antiskate was better? Maybe antiskate is less critical on a unipivot arm? But then why, if he didn't find any advantage to it, did VPI develop an antiskate for the arm? I don't believe he would state that twisting the wires does the same thing his antiskate device that he's now selling. I also don't think he'd sell something just because people thought they needed it. It would really cast a negative light on VPI, a company that fosters a healthy upgrade path for it's customers.
Simple fact is there was no reliable way of setting antiskate by twisting wires, needed or not. While you can get really satisfactory sound twisting or not, 1 twist or 3, there was no set method and everyone did what they thought was best. Lots of posts on that. The new method is much more reliable and consistant.
Maybe they did do it to sell more tonearms. Antiskate has to my knowledge always been an issue long before HW came around. It only helps to at least have the capability to adjust it. I have heard of statements from another person in VPI who said the antiskate was effective.
It does make a very subtle improvement to my ears, and it is a much more accurate method of controlling the antiskate. I assume more people will eventually reach their own conclusions after they compare themselves. Most of the post I've read are of people not using it simply because of what they read. That's really the reason for my long rant.