Being cynical, the more padding they put in, the less content. This means they can spin out two pieces of information for as long as they like. As well as all the other points everyone has made with which I entirely agree, why do we now have so many former presenters moving into the expert role? Six weeks presenting a nature programme, and you're suddenly an ecologist! There are plenty of experts still around, but all too often they have to trivialise the subject to suit what they believe we want! Why does everyone like and admire David Attenborough? Because he knows what he is talking about, he makes sure he isn't the focus of attention to the detriment of the topic and he explains and comments without talking down to us. Couldn't he run some workshops for the others?