I've heard this stuff before.
There is no way you can continually lose that amount of weight each week without stupidly extreme methods. There is a reason most of the contestants regain the weight (and sometimes more).
There are other programmes that essentially do the same and their 'tough love' is nothing short of a form of abuse.
But people want to believe in quick fixes. They don't want to hear that healthy diet plus exercise over a reasonable period of time is the best way to lose weight.
I have 9 stone to lose in total (half my body weight) and have lost 5stone so far. It has taken me 9 months and that is reasonably quick, but the bigger you are the quicker you can lose weight, though bear in mind that means 2lb a week rather than 0.5-1lb. The weightloss is going to slow down the closer I get to goal. I see so many people disheartened though when they realise how long it will take and how slow it will be.
The number of people who are shocked when you tell them how you lost the weight. They genuinely don't think it is possible and you must have some secret trick 