Has Murdoch Ditched Gordon?

I have been struck over the last week or two by the number of headlines in the Sun and the Times carrying pro-Tory messages.  In particular, the Murdoch press has come out strongly in favour of Boris for the Mayoral race.  More than all the disasters for Labour over the last 6 months, I think this may be a real turning point.  There are two explanations:

1) The News International press tries to reflect the feeling of the country as a whole to attract a larger readership

or

2) The Dirty Digger thinks that Gordon is a Loser and is not going to back him.

Murdoch has acute political judgment.  Neither explanation bodes well for Gordon Brown