I personally am not a fan of any clinician. Not to say they don't start out with good ideas or methods but more often then not, they are moved into "fast fixes" through either greed or pressure to stay in the spot light or succeed in front of the audience.
I think in the case of Linda, she is trying to cash in on her husbands name. What I saw in the video was an example of why I don't like the "followers" of these clinicians. You can have a guy (Parelli in this case) who does some good things with horses and maybe teaches a few folks his ways. All of a sudden he is in the spotlight trying to make big bucks and people are jumping off cliffs because this now famous person said so. He might have had great ideas to start but people learn bits and pieces and think they are the new masters of the training world because they sat through a clinic, bought a book or watched a DVD. Heck, they even bought the special rope, halter and whip so they KNOW how to train all horses now.
Clearly if this mans wife doesn't get it, there are hundred of others out there that have not quite got it down pat either. Common sense really goes a long way in horse training and sadly, once some people watch the DVD, that seems to go out the window.