What a very strange thread Nay turned this perfectly ordinary OP into 
I saw the documentary - the premise was a bit odd - the family took stats from a marketing agency on the exact average things that market research indicated "Germans" did, and tried to live precisely according to that average - down to leaving 2 of their children behind in the UK to be closer to the "average" number of children per family. Everything was very much staged around that - there was no real attempt to hide the fact everything was staged.
The thing that struck me the most was the fact absolutely everyone spoke English the whole time :o Imagine if a German family had tried to live as Mr and Mrs Smith, the "Average" Brits - somehow I think they'd have had to speak English, unlike "Herr and Frau Müller" - who never attempted to speak any German yet said they were sampling life as typical "average" Germans :o
I also think this documentary could have been made in the UK with British people trying to live (for just 2 weeks, which is all this family did) according to a marketing company's research findings of the exact average Brit, with equally unrealistic results :o
It was all a lot of nothing really - a lot was made of the woman staying home with the 2 year old, yet the child was barely ever with her and she was filmed doing the supermarket shop alone while her husband was at work - presumably she left the toddler with the camera crew :o Don't think they got any more in depth knowledge of what really makes Germany tick than any 15 year old on a 2 week school exchange programme, probably a lot less as of course the 15 year old would be living full time with a German family and trying to speak the language!
It was a fluff programme really - I expected it to be more annoying (live in Germany) but it was a bit of nothing really, not much to it.