I have my doubts about this assertion from Informa Telecoms:
Android smartphone sales will outstrip iPhone sales by 2012, market researcher Informa Telecoms & Media has predicted in a new report.
The thing is, to get an iPhone user to switch to the gPhone, the gPhone would have to have compelling advantages. Being "just as good" isn't good enough; the normal inertia of staying with what you have will see to that. I don't think open source vs. proprietary has anything to do with this - but this earlier story about Apple's issues dealing with iPhone developers might. Still, I'm very skeptical.