Two years?

In 2004, almost 5 million Canadians voted Liberal.
In 2011, only 2.7 million voted Liberal.
By the time Liberals finally choose a new leader in 2013, I wouldn't be surprised if there are at least another million Canadians can't remember who this party is or why they ever voted for them.
Why are they waiting so long? It seems because they're afraid of the Harper Conservatives:

They were persuaded [to wait] by former leader Stephane Dion, who reminded delegates of the hatchet jobs done on him and Ignatieff by relentless Tory attack ads. Liberals, he argued, must not choose a new leader until they've amassed the money and organization needed to fight back against the inevitable Tory onslaught . . . If Liberals choose a leader before undertaking any rebuilding, Dion said, "The leader will be without any protection facing the Conservatives."

And Dion also says:

"the only good news of this disastrous (election) result" is that Liberals have plenty of time to pull themselves back together.

How naive, to believe that Harper actually won't call another federal election until 2015.