macdoodle - you wanted to meet someone who did it and maintained it? Here I am.
I lost over 3 stone and went from a BMI of 31 to BMI 23. That was 3.5 years ago and I have stayed the same.
The CBT may not be one-to-one, or extensive, but you do have 2 hrs counselling each week and for me it helped me to understand why I was overeating.
Many girls on my class lost a lot more, and they have maintained it too.
It was the easiest diet I have ever done - no room for error, and very rewarding fast weight loss.
I would wholeheartedly recommend it to anyone. I'm not a moron either - IQ of 159 and two degrees say I am not!
Your colleague has taken you into your confidence and asked for your support - you have abused her trust and been entirely unkind.
But don't worry, it is one of the first things LL teaches you - that friends and family, especially if they have weight isssues themselves, can often try to put you off.
I hope your friend sticks to her guns and loses all the weight she wants.
YABU - you'd be a lot happier if you lost weight!