i love this show too, they are all different people and it's interesting to see them as their kids grow up.
the thing to remember is that they are filmed over a number of days for maybe a 15 section on a particular show, so you will never be getting the full picture about how they are as parents, i am sure if you edited my life and only caught me lying watching TV after a 10 hour day at work and giving my daughter ovenchips instead of her usual homemade meatballs and telling her to go watch tv so i can finish a phonecall, which i admit happens occasionally, it would protray me as a horrible mum. you wouldn't see the swimming lessons from 6 weeks, even when i was feeling really rubbish so now at nearly 3 she can swim, the constant reading, her nursery teacher thinks she'll be bored when she starts next term as she can do alphabet and count really well, and all the other things that we teach them, but it's not really good tv.