I agree with your hesitation and with your recommendation.I hesitated when I first saw this. I like VegSource, but it's only a single series of tests on one person(and an anecdote by Jeffs own admission). Nothing that could be called conclusive by any stretch. Besides this, the meal as presented was a purely nut - no other fiber meal, so that too made me wonder. However, heart disease patients should follow the advice of Esselstyn/Ornish regardless, as the long term research on reversing heart disease (and preventing it) is already there.
The thing that is interesting, for me, is just the bottom line info that nuts or any other overt fat can stiffen our arteries, whether temporarily or longer term. So I would take, from this, that having a bowl of pasta before going for a run would be a better choice than having a handful of nuts. As I don't run I would apply that to tasks like raking or shovelling the driveway. How many people have you heard of that ate a big dinner then went out and shovelled or raked or did some other task that required good circulation? I know someone that happened to on Christmas Day, big turkey dinner, outside for shovelling, heart attack, gone. Very sad and now it makes more sense.