I read the article. It's the usual we-were-doing-grappling-before-the-Gracies thing. It was actually kind of sad...claiming it had always been there and was a crucial part of the art but that people weren't ready for it in the 70s. Frankly, it read like a parody of arts jumping on the grappling bandwagon.
It's all the more sad because I believe HRD has a lot to offer, and standing grappling has always been a significant part of the system...but they're obviously trying to cash in on the grappling craze and are once again using the sort of false history that the Lees are notorious for using.