One further note to add to this 'roundtable'.
In all probability, DiMarzio reads this forum and is aware of this discussion, either alerted by one or more of the forum members here, or as a result of their own monitoring. They haven't chimed in for a plethora of reasons; let's review a few of them, shall we?
1. They don't know this thread exists, don't care, or have time to care.
2. No secrets have been revealed. Their current factory configuration and their current winding technology bears little resemblance to anything I have previously described. Hence, no need to 'cry havoc and let slip the DiMarzios of war' (apologies to Shakespeare). How do I know this? At the end of the day, Staten Island is an amazingly small "town".
3. Any tangible response is tantamount to giving away something important for nothing. That is one thing they have NEVER done. I know for a fact some of the better known boutique manufacturers will also not discuss 'proprietary' fabrication techniques or discoveries of what subtle changes will do. They fought hard for it, just like DiMarzio or Duncan.
4. The technology behind pickup making is almost common knowledge. Simply put, if you know your science, you can figure out what you need to do. There is plenty of information online and in published books (and papers) about this subject.
5. Besides, good magicians never reveal their secrets anyway.
Lastly, truth be told, there are many folks who want information about pickup theory, design and manufacture for free who don't want to "do the homework" required. While the technology is not exactly rocket science, certain aspects of pickup design were hard won. If this was your company, would you give them away? I can clearly understand DiMarzio's hard line about discussing technical information. They have suffered fools gladly for a very long time but likely hated every minute of it. Both with customers and unfortunately, some employees (myself included I have to admit; but those events will go with me to my grave). While I do not condone Mr. Warmth's attitude, I can now see where it comes from, and the lack of patience that eventually produces it (although, I must offer that this is conjecture; he could just be a card-carrying sociopath).
One thing you have to give DiMarzio credit for (and Seymour Duncan, et al) - regardless of what you think of them is their ability / talent for unwavering focus and dedication to a business plan, and a drive to succeed. If every small business was run similarly, we wouldn't "need" China. Remember what I posted earlier: they have been in business almost 40 years. The main core of individuals who began the company are still there! You don't think it was all just a fluke, do you? It's a good chance they will stop working when they are dragged out by their feet. (Mr. Warmth -- are you listening?)
But I digress.....
Dr. X