I have no idea. It's kind of as I was saying in my original post in this thread, I think in general, when you're not good at a technique, you use strength to fill in the gaps. They could be throws, they could be submissions. But if you haven't learned a technique to mastery level, and it doesn't work on bigger guys, it's natural to blame it on a lack of strength. I think from there Helio had to fill in the details himself. In many cases, he did it the same way it was being done in Japan, sort of independently discovering the same thing. In other ways, he did the same techniques slightly differently than in Judo. For example look at the traditional BJJ way of teaching an armbar from guard, and the traditional Judo way of doing it.
I think that's it. BTW, judo people, who've typically done a couple of years of high school wrestling (at most), or who's contact with wrestling is via students with a couple of years of high school wrestling, often think wrestling is much more strength based than judo. Its only when they work with a high quality wrestler do they realize that wrestling is as skill based as judo. As you say, beginners in any grappling (or probably any combat sport) try to use strength to fill holes in their technique, often without realizing it. So if your only experience with a style is with its beginners, you're going to think its based on being stronger ...
It makes complete sense to me that's what Helio was thinking about when he said judo was strength based - his experience with judo (ie three years training) would actually be strength based. Same as a lot of judoka's experience with wrestling.