I think the rough estimation is out there, and the rules of thumb as well from the Department of Finance, that for every point reduction in the corporate statutory rate, you're talking about something in the neighbourhood of $1.5 billion to $2 billion, depending on the level of corporate income.
So yes, if you are talking about three points, you could be talking upwards of $5 billion to $6 billion.
In Canada we're talking about the economy getting back to its potential in 2016 and a structural deficit of about $11 billion. It wouldn't quite close the gap, but it would help.