Clearly, her ability to whisper "to whisper sweet nothings" was judged more potent than Mrs Cameron's.
It looks like The Telegraph is a hopeless case, unaware that we live in the 21st century, where professional politicians are ... um ... professional politicians, not inbred aristocrats whose opinion can be swayed by their helpmeet's wheedling.
1 - As described previously on lefthandpalm: http://lefthandpalm.blogspot.com/2009/02/ridiculous.html
2 - "The 20 most influential people in Barack Obama's White House," unattributed article published in The Telegraph, 9th of February, 2009. (http://www.telegraph.co.uk/news/worldnews/northamerica/usa/barackobama/4537027/The-20-most-influential-people-in-Barack-Obamas-White-House.html?image=16)