I absolutely LOVE the Biggest Loser - UK or US version! I agree that their weight losses are totally unrealistic to most of us, bit like you say, its really good motivation as you see their bodies change. I'm sure that if we were sent away to a place where we had a trainer for us everyday and meals were all worked out for us, we would be losing a lot more - but the real world just gets in the way!
I think it is a good group, I'm looking forward to seeing how it goes for them all. Loved the bit when the guys mooned at the only girl in their group!!