I have two quick comments to add to Craig's.
Number one, I think the last few years show the value of the flexibility of an inflation-targeting system. With the inflation expectations very well anchored, it liberated, if you like, the Bank of Canada to be very aggressive in its policy response. It was very aggressive, and it could be very aggressive in terms of cutting rates and doing other creative things secure in the knowledge that expectations wouldn't be dislodged.
The second thing is that in the last three or four years, I wouldn't call it a structural change, but financial stability, of course, has become an issue that central banks are thinking more about now than they were eight years ago. That's entirely appropriate and consistent with the inflation-targeting system. The flexibility, or the constrained discretion, allows the bank to think about that.