I used it in CYYZ for a few years while I worked there and technically the book says you may since a landing clearance assures that appropriate runway separation will exist. Local interpretations vary though.
You have to use it wisely though and with a purpose. I used it in daytime VFR with proper traffic info passed and in situations where the spacing between arrivals was constant and the possibility of a go-around was remote.
My rationale is that I'd rather not be giving a late landing clearance to someone just as the one on the roll is calling out with an abort.
I also trust the will of a pilot not to die to ensure he won't hit an aircraft lined-up that's forgotten to roll.
That being said, I also believe that it has to be used wisely and that combining the lowest denominators on both sides of the frequency could result in something ugly.
I say: Let the book say what is says and those that have the Mojo use it when they can instead of trying to teach it.
LX