...Is that folks may finally be getting sick of it!
The Conservative candidate's win over Ken Livingstone followed a calamitous showing for Labour at the local elections - the party's worst performance at the polls for 40 years.
Mr Johnson's landmark victory, a result that would have been almost unthinkable six months ago, was the most symbolic blow to Mr Brown's authority on a day that left the Prime Minister facing the gravest crisis of his leadership.
By taking City Hall, Mr Johnson becomes the first Tory politician to hold a senior role in British politics since the party was swept out of power in 1997. His win provided a significant boost to David Cameron's bid for victory at the next general election.
In the local elections, Labour lost more than 300 councillors and slumped to a humiliating third place behind the Liberal Democrats in the share of the vote – a full 20 points behind Mr Cameron's Conservatives.
There may be hope for the Brits yet...