I have honestly never seen the attraction to following what Oprah says, just not into her I guess.
It is great that she has lost weight and believes " her" plan is best, but as someone else has already stated it's all about commercialism.
Oprah has a chef, a personal trainer and lots of money to lose weight. I don't relate to that because I am a real person trying to make due and lose weight at the same time. If I had someone making my meals for me everyday following a low carb plan I would lose as well. What she has done is phoenominal, but plenty of people lose with absolutely no recognition to what worked for them.
If Atkins works for you, Great !! Nothing a celebrity has to say, for means of personal monetary gain, means a thing to me . Business woman yes, doctor no.

Btw: A person comes up to me at work and says "Hey you know what ? Did you know Dr. Atkins was considered obese when he died ?". I of course was stunned but turned around and asked him " Well do you know what he weighed before he started his weight loss research?"... of course the answer was no.
You can't believe everything you read or hear.