As much as I disdain Intel, many of their policies, their bullying of vendors, and overpricing, I suspect they were only trying to run the meeting the only way they knew how.
Intel being a top-down type of company accustomed to dictating to its employees, vendors, and partners (and customers) how action will be taken has probably very little experience with open standards. They're accustomed to creating a product and having everyone follow/reverse engineer their lead. It could be Intel simply needs advice that "this is not how we do things on open standards". Their only probable fear of using the IETF model is probably not anarchy (the IETF doesn't have an anarchy problem), but losing the power they're accustomed to wielding. I'm willing to bet that if enough attendees made it known that they'd do the standards process without Intel if Intel doesn't comply with the way it's done, that Intel would fall in line rather quickly.
Intel is accustomed to being the company that calls the shots, and thus doesn't know how to participate in an open standards process. I'd say explain it to them, give them a chance, and if they don't go along with The Way It's Done, ditch them.