Four out of ten Blackberry and other smartphone users would switch to Apple's iPhone, as their next smartphone purchase, according to a recent survey conducted by Crowd Science. On the other hand, only 14 per cent of non-Blackberry smartphone users would switch to a Blackberry for their next purchase. Meanwhile, a vast majority of iPhone users (82 per cent) are loyal to the iPhone brand. "These results reflect the great challenges Blackberry faces in stemming the iPhone stampede," said John Martin, CEO of Crowd Science. Article