Hi. I had a BlackBerry a few years ago and baptized it by dropping in a sink full of water.
Since, I've been using a Samsung Galaxy but I am very interested in the BB10 system.
Of course the touch-screen keyboard Z10 is on the shelves now but the physical keyboard Q10 isn't available, at least here in Canada until April. I don't know what the case is but, if the Z10 isn't selling well, people could be doing like I am and waiting for the Q10 so a comparison of the two models can be done before purchasing decisions are made.
Seems to me that a lot more people are doing the same thing...waiting until April. So if the company comes out and says that sales are below expectations, that is probably a big part of it.