Nokia say what Nokia has to say in a situation like this. Everyone, and Nokia in particular, knows that the real reason is that they aren't fast enough making a killer phone like the X10 mini (number one selling phone in Europe right now, not just smartphones, but every phone counting including "dumbphones"). The X10 mini is a smartphone running Android, so there should be no reason to be surprised.
That is the simple truth. iPhone, droids, Blackerries, totally uninteresting. The competition is from Sony Ericsson, and it will get worse before it gets better. Samsung and Bada is coming at full steam.